Annual report pursuant to Section 13 and 15(d)

Consolidated Schedule of Investments

v3.22.4
Consolidated Schedule of Investments - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]    
Investment, cost $ 3,773,752 [1],[2] $ 3,259,246 [3],[4]
Total Level 3 investments $ 4,102,177 [1],[5] $ 3,561,831 [3],[6]
Investment owned, percent of net assets 194.50% 199.20%
Analytical Systems Keco Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost $ 10,485 $ 10,679
Total Level 3 investments 8,046 9,630
ASC Interests, LLC    
Schedule of Investments [Line Items]    
Investment, cost 3,549 3,336
Total Level 3 investments 2,849 2,556
ATS Workholding, LLC    
Schedule of Investments [Line Items]    
Investment, cost 8,484 [7] 8,361 [8]
Total Level 3 investments 1,639 [7] 3,005 [8]
Barfly Ventures, LLC    
Schedule of Investments [Line Items]    
Investment, cost 2,295 [7] 2,295 [8]
Total Level 3 investments 4,031 [7] 2,641 [8]
Batjer TopCo, LLC    
Schedule of Investments [Line Items]    
Investment, cost 15,020  
Total Level 3 investments 15,020  
Bolder Panther Group, LLC    
Schedule of Investments [Line Items]    
Investment, cost 112,576 62,881
Total Level 3 investments 130,614 72,364
Brewer Crane Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 10,244 12,317
Total Level 3 investments 13,044 15,747
Bridge Capital Solutions Corporation    
Schedule of Investments [Line Items]    
Investment, cost 12,945 12,945
Total Level 3 investments 15,153 14,873
California Splendor Holdings LLC    
Schedule of Investments [Line Items]    
Investment, cost 42,720 48,200
Total Level 3 investments 57,489 50,700
Centre Technologies Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 21,076 15,210
Total Level 3 investments 23,654 14,704
Chamberlin Holding LLC    
Schedule of Investments [Line Items]    
Investment, cost 30,148 30,500
Total Level 3 investments 42,575 43,497
Charps, LLC    
Schedule of Investments [Line Items]    
Investment, cost 6,606 6,562
Total Level 3 investments 19,034 19,684
Clad-Rex Steel, LLC    
Schedule of Investments [Line Items]    
Investment, cost 18,969 18,962
Total Level 3 investments 20,309 22,252
Cody Pools, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 50,281 50,434
Total Level 3 investments 100,443 90,124
Colonial Electric Company LLC    
Schedule of Investments [Line Items]    
Investment, cost 30,831 32,031
Total Level 3 investments 32,311 33,481
CompareNetworks Topco, LLC    
Schedule of Investments [Line Items]    
Investment, cost 7,207 8,427
Total Level 3 investments 25,071 18,477
Datacom, LLC    
Schedule of Investments [Line Items]    
Investment, cost 11,023 10,906
Total Level 3 investments 10,682 10,278
Digital Products Holdings LLC    
Schedule of Investments [Line Items]    
Investment, cost 25,024 26,302
Total Level 3 investments 25,358 26,636
Direct Marketing Solutions, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 35,434 32,311
Total Level 3 investments 49,487 42,398
Elgin AcquireCo, LLC    
Schedule of Investments [Line Items]    
Investment, cost 34,040  
Total Level 3 investments 34,040  
Gamber-Johnson Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 81,377 39,227
Total Level 3 investments 114,968 71,298
Garreco, LLC    
Schedule of Investments [Line Items]    
Investment, cost 5,026 5,396
Total Level 3 investments 5,626 6,466
GRT Rubber Technologies LLC    
Schedule of Investments [Line Items]    
Investment, cost 54,048 51,737
Total Level 3 investments 85,603 85,075
Gulf Publishing Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 11,681 17,503
Total Level 3 investments 6,064 9,974
Harris Preston Fund Investments    
Schedule of Investments [Line Items]    
Investment, cost [9],[10] 4,143  
Total Level 3 investments [9],[10] 7,800  
Jensen Jewelers of Idaho, LLC    
Schedule of Investments [Line Items]    
Investment, cost 3,255 3,347
Total Level 3 investments 17,420 14,970
Johnson Downie Opco, LLC    
Schedule of Investments [Line Items]    
Investment, cost 13,056 14,494
Total Level 3 investments 15,539 14,494
JorVet Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 36,173  
Total Level 3 investments 36,173  
Kickhaefer Manufacturing Company, LLC    
Schedule of Investments [Line Items]    
Investment, cost 37,448 37,432
Total Level 3 investments 34,286 38,970
Market Force Information, LLC    
Schedule of Investments [Line Items]    
Investment, cost 48,847 45,994
Total Level 3 investments 7,700 12,336
MetalForming AcquireCo, LLC    
Schedule of Investments [Line Items]    
Investment, cost 31,123  
Total Level 3 investments 31,123  
MH Corbin Holding LLC    
Schedule of Investments [Line Items]    
Investment, cost 16,556 18,641
Total Level 3 investments 4,548 5,934
MS Private Loan Fund I, LP    
Schedule of Investments [Line Items]    
Investment, cost 14,250 [9],[10] 65,651 [11],[12]
Total Level 3 investments 14,833 [9],[10] 65,732 [11],[12]
Mystic Logistics Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 8,466 9,097
Total Level 3 investments 28,576 15,218
Nebraska Vet AcquireCo, LLC    
Schedule of Investments [Line Items]    
Investment, cost 37,393 22,228
Total Level 3 investments 38,294 22,941
NexRev LLC    
Schedule of Investments [Line Items]    
Investment, cost 19,548 23,053
Total Level 3 investments 9,587 16,735
NRP Jones, LLC    
Schedule of Investments [Line Items]    
Investment, cost 5,797 5,797
Total Level 3 investments 6,870 8,520
NuStep, LLC    
Schedule of Investments [Line Items]    
Investment, cost 35,075 29,156
Total Level 3 investments 36,003 32,460
OMi Topco, LLC    
Schedule of Investments [Line Items]    
Investment, cost 16,714 18,911
Total Level 3 investments 38,560 38,210
Orttech Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 33,429 34,151
Total Level 3 investments 35,179 34,151
Pearl Meyer Topco LLC    
Schedule of Investments [Line Items]    
Investment, cost 41,537 45,438
Total Level 3 investments 71,941 59,644
PPL RVs, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 23,787 14,531
Total Level 3 investments 40,843 26,741
Principle Environmental, LLC    
Schedule of Investments [Line Items]    
Investment, cost 12,715 14,182
Total Level 3 investments 18,816 19,143
Robbins Bros. Jewelry, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 46,439 47,026
Total Level 3 investments 50,249 47,026
Tedder Industries, LLC    
Schedule of Investments [Line Items]    
Investment, cost 26,277 24,760
Total Level 3 investments 24,641 24,760
Televerde, LLC    
Schedule of Investments [Line Items]    
Investment, cost 2,008  
Total Level 3 investments 7,202  
Trantech Radiator Topco, LLC    
Schedule of Investments [Line Items]    
Investment, cost 12,544 13,318
Total Level 3 investments 15,720 17,372
VVS Holdco LLC    
Schedule of Investments [Line Items]    
Investment, cost 41,977 43,110
Total Level 3 investments 42,080 43,109
Ziegler’s NYPD, LLC    
Schedule of Investments [Line Items]    
Investment, cost 7,634 7,809
Total Level 3 investments 4,311 6,505
AAC Holdings, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 14,738 [13] 13,159 [14]
Total Level 3 investments 11,550 [13] 13,813 [14]
AFG Capital Group, LLC    
Schedule of Investments [Line Items]    
Investment, cost   1,344
Total Level 3 investments   7,884
ATX Networks Corp.    
Schedule of Investments [Line Items]    
Investment, cost 8,499 [13] 9,055 [14]
Total Level 3 investments 12,211 [13] 9,055 [14]
BBB Tank Services, LLC    
Schedule of Investments [Line Items]    
Investment, cost 5,762 5,762
Total Level 3 investments 2,886 2,508
Boccella Precast Products LLC    
Schedule of Investments [Line Items]    
Investment, cost 2,576 2,576
Total Level 3 investments 3,290 5,150
Buca C, LLC    
Schedule of Investments [Line Items]    
Investment, cost 22,125 24,261
Total Level 3 investments 12,337 14,370
Career Team Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 24,581 24,550
Total Level 3 investments 24,581 24,550
Classic H&G Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 29,502 28,899
Total Level 3 investments 48,471 38,534
DMA Industries, LLC    
Schedule of Investments [Line Items]    
Investment, cost 26,979 26,937
Total Level 3 investments 28,460 26,937
Dos Rios Partners    
Schedule of Investments [Line Items]    
Investment, cost 8,510 [9],[10] 8,702 [11],[12]
Total Level 3 investments 12,025 [9],[10] 13,609 [11],[12]
Flame King Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 38,975 37,720
Total Level 3 investments 46,380 37,720
Freeport Financial Funds    
Schedule of Investments [Line Items]    
Investment, cost 9,810 [9],[10] 13,603 [11],[12]
Total Level 3 investments 9,331 [9],[10] 13,309 [11],[12]
GFG Group, LLC.    
Schedule of Investments [Line Items]    
Investment, cost 16,169 17,335
Total Level 3 investments 18,485 19,535
Harris Preston Fund Investments    
Schedule of Investments [Line Items]    
Investment, cost [9],[10] 6,290  
Total Level 3 investments [9],[10] 8,063  
Hawk Ridge Systems, LLC    
Schedule of Investments [Line Items]    
Investment, cost 43,868 40,257 [12]
Total Level 3 investments 59,365 52,835 [12]
Houston Plating and Coatings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 5,352 5,352
Total Level 3 investments 5,400 6,170
Iron-Main Investments, LLC    
Schedule of Investments [Line Items]    
Investment, cost 37,931 38,274
Total Level 3 investments 37,931 38,274
L.F. Manufacturing Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost [8]   2,126
Total Level 3 investments [8]   2,664
OnAsset Intelligence, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 12,683 12,322
Total Level 3 investments 5,309 8,422
Oneliance, LLC    
Schedule of Investments [Line Items]    
Investment, cost 6,615 6,603
Total Level 3 investments 6,615 6,603
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)    
Schedule of Investments [Line Items]    
Investment, cost 32,365 32,365
Total Level 3 investments 0 0
SI East, LLC    
Schedule of Investments [Line Items]    
Investment, cost 90,926 66,956
Total Level 3 investments 103,436 77,420
Slick Innovations, LLC    
Schedule of Investments [Line Items]    
Investment, cost 14,154 6,129
Total Level 3 investments 15,370 7,230
Sonic Systems International, LLC    
Schedule of Investments [Line Items]    
Investment, cost 16,883 [7] 12,827 [8]
Total Level 3 investments 17,049 [7] 12,827 [8]
Student Resource Center, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 4,556  
Total Level 3 investments [7] 4,556  
Superior Rigging & Erecting Co.    
Schedule of Investments [Line Items]    
Investment, cost 25,878 25,832
Total Level 3 investments 25,878 25,832
The Affiliati Network, LLC    
Schedule of Investments [Line Items]    
Investment, cost 15,948 19,496
Total Level 3 investments 15,948 19,496
UniTek Global Services, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 20,535 [13] 19,103 [14]
Total Level 3 investments 11,510 [13] 8,929 [14]
Universal Wellhead Services Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 5,032 [7] 5,032 [8]
Total Level 3 investments 220 [7] 0 [8]
Volusion, LLC    
Schedule of Investments [Line Items]    
Investment, cost 33,719 34,419
Total Level 3 investments 14,914 23,833
World Micro Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 17,985  
Total Level 3 investments 17,985  
AB Centers Acquisition Corporation    
Schedule of Investments [Line Items]    
Investment, cost [7] 17,216  
Total Level 3 investments [7] 17,754  
Acousti Engineering Company of Florida    
Schedule of Investments [Line Items]    
Investment, cost 12,294 [7] 12,846 [8],[15]
Total Level 3 investments 12,376 [7] 12,961 [8],[15]
Acumera, Inc.    
Schedule of Investments [Line Items]    
Investment, cost [7] 18,561  
Total Level 3 investments [7] 18,986  
Adams Publishing Group, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 28,762  
Total Level 3 investments [7] 28,815  
AMEREQUIP LLC.    
Schedule of Investments [Line Items]    
Investment, cost [7] 38,461  
Total Level 3 investments [7] 39,105  
American Health Staffing Group, Inc.    
Schedule of Investments [Line Items]    
Investment, cost [7] 6,555  
Total Level 3 investments [7] 6,607  
American Nuts, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 30,816  
Total Level 3 investments [7] 29,260  
American Teleconferencing Services, Ltd.    
Schedule of Investments [Line Items]    
Investment, cost 16,686 [13] 16,686 [14]
Total Level 3 investments 976 [13] 520 [14]
ArborWorks, LLC    
Schedule of Investments [Line Items]    
Investment, cost 34,064 [7] 32,107 [8]
Total Level 3 investments 29,010 [7] 32,107 [8]
Archer Systems, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 67,583  
Total Level 3 investments [7] 67,764  
ATS Operating, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 14,040  
Total Level 3 investments [7] 13,835  
AVEX Aviation Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 28,230 [7] 13,365 [8]
Total Level 3 investments 28,276 [7] 13,365 [8]
Berry Aviation, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 1,356 [7] 6,513 [8]
Total Level 3 investments 5,026 [7] 7,389 [8]
Bettercloud, Inc.    
Schedule of Investments [Line Items]    
Investment, cost [7] 26,944  
Total Level 3 investments [7] 27,429  
Binswanger Enterprises, LLC    
Schedule of Investments [Line Items]    
Investment, cost [8]   13,157
Total Level 3 investments [8]   12,924
Bluestem Brands, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 3,317 [13] 5,358 [14]
Total Level 3 investments 9,094 [13] 6,852 [14]
Brainworks Software, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 7,817  
Total Level 3 investments [7] 3,677  
Brightwood Capital Fund Investments    
Schedule of Investments [Line Items]    
Investment, cost 13,412 [9],[10] 11,550 [11],[12]
Total Level 3 investments 11,497 [9],[10] 8,663 [11],[12]
Burning Glass Intermediate Holding Company, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 19,628 [7] 20,232 [8]
Total Level 3 investments 19,933 [7] 20,414 [8]
CAI Software LLC    
Schedule of Investments [Line Items]    
Investment, cost 1,789 1,789
Total Level 3 investments 1,789 1,789
CaseWorthy, Inc.    
Schedule of Investments [Line Items]    
Investment, cost [7] 14,228  
Total Level 3 investments [7] 14,282  
Channel Partners Intermediateco, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 40,163  
Total Level 3 investments [7] 40,325  
Computer Data Source, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 23,243  
Total Level 3 investments [7] 21,799  
Dalton US Inc.    
Schedule of Investments [Line Items]    
Investment, cost [7] 15,123  
Total Level 3 investments [7] 15,390  
Darr Equipment LP    
Schedule of Investments [Line Items]    
Investment, cost [8]   5,159
Total Level 3 investments [8]   4,387
DTE Enterprises, LLC    
Schedule of Investments [Line Items]    
Investment, cost 8,001 [7] 11,086 [8]
Total Level 3 investments 7,474 [7] 10,255 [8]
Dynamic Communities, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 3,487  
Total Level 3 investments [7] 3,487  
Eastern Wholesale Fence LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 31,406  
Total Level 3 investments [7] 31,159  
EnCap Energy Fund Investments    
Schedule of Investments [Line Items]    
Investment, cost 28,866 [9],[10] 30,996 [11],[12]
Total Level 3 investments 21,905 [9],[10] 20,796 [11],[12]
Centre Technologies Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 16,132  
Total Level 3 investments [7] 16,469  
Event Holdco, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 47,618  
Total Level 3 investments [7] 45,590  
Flip Electronics LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 11,588  
Total Level 3 investments [7] 11,831  
Fuse, LLC    
Schedule of Investments [Line Items]    
Investment, cost 2,066 [13] 2,066 [14]
Total Level 3 investments 1,512 [13] 1,672 [14]
Grupo Hima San Pablo, Inc.    
Schedule of Investments [Line Items]    
Investment, cost [14]   6,691
Total Level 3 investments [14]   1,465
GS HVAM Intermediate, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 12,864  
Total Level 3 investments [7] 12,876  
GULF PACIFIC ACQUISITION, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 3,809  
Total Level 3 investments [7] 3,898  
HDC/HW Intermediate Holdings    
Schedule of Investments [Line Items]    
Investment, cost [7] 3,581  
Total Level 3 investments [7] 3,497  
HEADLANDS OP-CO LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 16,359  
Total Level 3 investments [7] 16,667  
IG Parent Corporation    
Schedule of Investments [Line Items]    
Investment, cost [13] 14,974  
Total Level 3 investments [13] 15,197  
Independent Pet Partners Intermediate Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 30,253 [7] 28,217 [8]
Total Level 3 investments 15,429 [7] 27,753 [8]
Industrial Services Acquisition, LLC    
Schedule of Investments [Line Items]    
Investment, cost 20,507 [7] 20,591 [8]
Total Level 3 investments 20,540 [7] 20,483 [8]
Infolinks Media Buyco, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 8,442  
Total Level 3 investments [7] 8,574  
Interface Security Systems, L.L.C    
Schedule of Investments [Line Items]    
Investment, cost 8,919 [7] 7,762 [8]
Total Level 3 investments 2,764 [7] 5,758 [8]
Invincible Boat Company, LLC.    
Schedule of Investments [Line Items]    
Investment, cost [7] 17,402  
Total Level 3 investments [7] 17,511  
Jackmont Hospitality, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 2,685 [7] 2,414 [8]
Total Level 3 investments 3,202 [7] 2,414 [8]
Joerns Healthcare, LLC    
Schedule of Investments [Line Items]    
Investment, cost 10,723 [13] 9,422 [14]
Total Level 3 investments 2,801 [13] 4,662 [14]
JTI Electrical & Mechanical, LLC    
Schedule of Investments [Line Items]    
Investment, cost 37,907 [7] 38,656 [8]
Total Level 3 investments 39,652 [7] 38,656 [8]
KMS, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 8,410  
Total Level 3 investments [7] 8,017  
LL Management, Inc.    
Schedule of Investments [Line Items]    
Investment, cost [7] 27,980  
Total Level 3 investments [7] 27,926  
Mac Lean-Fogg Company    
Schedule of Investments [Line Items]    
Investment, cost [8]   18,915
Total Level 3 investments [8]   19,000
Mako Steel, LP    
Schedule of Investments [Line Items]    
Investment, cost [7] 18,185  
Total Level 3 investments [7] 18,307  
MB2 Dental Solutions, LLC    
Schedule of Investments [Line Items]    
Investment, cost [13] 16,051  
Total Level 3 investments [13] 16,214  
Microbe Formulas, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 25,556  
Total Level 3 investments [7] 25,118  
MonitorUS Holding, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7],[10],[16] 27,494  
Total Level 3 investments [7],[10],[16] 28,577  
NinjaTrader, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 21,379  
Total Level 3 investments [7] 21,628  
NWN Corporation    
Schedule of Investments [Line Items]    
Investment, cost [7] 49,085  
Total Level 3 investments [7] 47,530  
Paragon Healthcare, Inc.    
Schedule of Investments [Line Items]    
Investment, cost [7] 20,898  
Total Level 3 investments [7] 21,118  
Project Eagle Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 29,022  
Total Level 3 investments [7] 29,401  
PTL US Bidco, Inc    
Schedule of Investments [Line Items]    
Investment, cost [7],[10] 27,575  
Total Level 3 investments [7],[10] 27,737  
RA Outdoors LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 13,230  
Total Level 3 investments [7] 12,083  
PT Network, LLC    
Schedule of Investments [Line Items]    
Investment, cost [8]   8,889
Total Level 3 investments [8]   8,969
RM Bidder, LLC    
Schedule of Investments [Line Items]    
Investment, cost 471 [7] 471 [8]
Total Level 3 investments 19 [7] 26 [8]
Roof Opco, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 5,716  
Total Level 3 investments [7] 5,817  
RTIC Subsidiary Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 17,849  
Total Level 3 investments [7] 16,625  
Rug Doctor, LLC.    
Schedule of Investments [Line Items]    
Investment, cost [7] 13,813  
Total Level 3 investments [7] 12,515  
Salient Partners L.P.    
Schedule of Investments [Line Items]    
Investment, cost [14]   7,497
Total Level 3 investments [14]   6,498
SIB Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 9,761 [7] 6,334 [8]
Total Level 3 investments 9,123 [7] 6,345 [8]
South Coast Terminals Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost 41,396 [7] 50,453 [8]
Total Level 3 investments 42,500 [7] 50,453 [8]
SPAU Holdings, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 16,223  
Total Level 3 investments [7] 16,510  
Veregy Consolidated, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 16,751 [13] 19,635 [14]
Total Level 3 investments 14,849 [13] 20,036 [14]
VORTEQ Coil Finishers, LLC    
Schedule of Investments [Line Items]    
Investment, cost [8]   26,488
Total Level 3 investments [8]   26,488
Wall Street Prep, Inc.    
Schedule of Investments [Line Items]    
Investment, cost 4,567 [7] 4,688 [8]
Total Level 3 investments 4,560 [7] 4,685 [8]
Watterson Brands, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 29,286  
Total Level 3 investments [7] 29,708  
West Star Aviation Acquisition, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 12,129  
Total Level 3 investments [7] 12,615  
Winter Services LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 9,797  
Total Level 3 investments [7] 9,975  
Xenon Arc, Inc.    
Schedule of Investments [Line Items]    
Investment, cost [7] 61,337  
Total Level 3 investments [7] 61,968  
Zips Car Wash, LLC    
Schedule of Investments [Line Items]    
Investment, cost [7] 21,639  
Total Level 3 investments [7] 21,891  
Control investments    
Schedule of Investments [Line Items]    
Investment, cost 1,270,802 [2],[17] 1,107,597 [4],[18]
Total Level 3 investments $ 1,703,172 [5],[17] $ 1,489,257 [6],[18]
Investment owned, percent of net assets 80.80% 83.30%
Affiliate investments    
Schedule of Investments [Line Items]    
Investment, cost $ 635,536 [2],[19] $ 578,539 [4],[20]
Total Level 3 investments $ 618,359 [5],[19] $ 549,214 [6],[20]
Investment owned, percent of net assets 29.30% 30.70%
Non‑Control/Non‑Affiliate investments    
Schedule of Investments [Line Items]    
Investment, cost $ 1,867,414 [2],[21] $ 1,573,110 [4],[22]
Total Level 3 investments $ 1,780,646 [5],[21] $ 1,523,360 [6],[22]
Investment owned, percent of net assets 84.40% 85.20%
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 593,928 [13] 593,928 [14]
Investment, cost $ 3,148 [13] $ 3,148 [14]
Total Level 3 investments $ 0 [13] $ 2,079 [14]
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 18.00% [13] 18.00% [14]
PIK Rate 18.00% [13] 8.00% [14]
Principal $ 11,726 [13] $ 10,202 [14]
Investment, cost 11,590 [13] 10,011 [14]
Total Level 3 investments $ 11,550 [13] $ 9,794 [14]
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 554,353 [13],[23] 554,353 [14],[24]
Investment, cost $ 0 [13],[23] $ 0 [14],[24]
Total Level 3 investments $ 0 [13],[23] $ 1,940 [14],[24]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 6.00%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (39)  
Total Level 3 investments [7],[25],[26],[27] $ (39)  
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.20%  
Spread [7],[25],[26] 6.00%  
Principal [7],[25],[26] $ 741  
Investment, cost [7],[25],[26] 653  
Total Level 3 investments [7],[25],[26] $ 741  
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.58%  
Spread [7],[25],[26] 6.00%  
Principal [7],[25],[26] $ 17,052  
Investment, cost [7],[25],[26] 16,602  
Total Level 3 investments [7],[25],[26] $ 17,052  
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.14% [13],[26] 6.75% [14],[15]
Spread 5.75% [13],[26] 5.75% [14],[15]
Principal $ 21,077 [13],[26] $ 22,136 [14],[15]
Investment, cost 20,781 [13],[26] 21,734 [14],[15]
Total Level 3 investments $ 18,969 [13],[26] $ 22,012 [14],[15]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 186 [28] 186 [29]
Investment, cost $ 1,200 [28] $ 1,200 [29]
Total Level 3 investments $ 9,400 [28] $ 7,740 [29]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   10.00%
Principal   $ 144
Investment, cost   144
Total Level 3 investments   $ 144
Investment, Identifier [Axis]: AMEREQUIP LLC., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [7] 235  
Investment, cost [7] $ 1,779  
Total Level 3 investments [7] $ 1,779  
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 7.40%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (137)  
Total Level 3 investments [7],[25],[26],[27] $ (137)  
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.72%  
Spread [7],[25],[26] 7.40%  
Principal [7],[25],[26] $ 37,491  
Investment, cost [7],[25],[26] 36,819  
Total Level 3 investments [7],[25],[26] $ 37,463  
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,500 1,500
Investment, cost $ 1,500 $ 1,500
Total Level 3 investments $ 800 $ 720
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 13.00% 13.00%
Principal $ 400 $ 200
Investment, cost 400 200
Total Level 3 investments $ 400 $ 200
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.00% 13.00%
Principal $ 1,650 $ 1,650
Investment, cost 1,649 1,636
Total Level 3 investments $ 1,649 $ 1,636
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [7] 720,000  
Investment, cost [7] $ 720  
Total Level 3 investments [7] $ 660  
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 5.50%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] 0  
Total Level 3 investments [7],[26],[27] $ 0  
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 9.32%  
Spread [7],[25],[26] 5.50%  
Principal [7],[25],[26] $ 6,660  
Investment, cost [7],[25],[26] 6,660  
Total Level 3 investments [7],[25],[26] $ 6,582  
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.32%  
Spread [7],[25],[26] 7.50%  
Principal [7],[25],[26] $ 6,660  
Investment, cost [7],[25],[26] 6,660  
Total Level 3 investments [7],[25],[26] $ 6,593  
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 3,725,862 [7] 3,725,862 [8]
Investment, cost $ 3,726 [7] $ 3,726 [8]
Total Level 3 investments $ 0 [7] $ 0 [8]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[30]   5.00%
Principal [8],[30]   $ 4,794
Investment, cost [8],[30]   4,635
Total Level 3 investments [8],[30]   $ 3,005
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[31] 5.00%  
Principal [7],[31] $ 1,901  
Investment, cost [7],[31] 1,901  
Total Level 3 investments [7],[31] $ 634  
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[31] 5.00%  
Principal [7],[31] $ 3,015  
Investment, cost [7],[31] 2,857  
Total Level 3 investments [7],[31] $ 1,005  
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 583 [13] 583 [14]
Investment, cost $ 0 [13] $ 0 [14]
Total Level 3 investments $ 3,270 [13] $ 0 [14]
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.23% [13],[26] 8.50% [14],[15]
Spread 7.50% [13],[26] 7.50% [14],[15]
Principal $ 6,783 [13],[26] $ 7,667 [14],[15]
Investment, cost 6,208 [13],[26] 7,092 [14],[15]
Total Level 3 investments $ 6,343 [13],[26] $ 7,092 [14],[15]
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.00% [13] 10.00% [14]
PIK Rate 10.00% [13] 10.00% [14]
Principal $ 3,396 [13] $ 3,067 [14]
Investment, cost 2,291 [13] 1,963 [14]
Total Level 3 investments $ 2,598 [13] $ 1,963 [14]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 360 [7] 360 [8]
Investment, cost $ 360 [7] $ 360 [8]
Total Level 3 investments $ 406 [7] $ 360 [8]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.50%
Spread [8],[15]   6.50%
Principal [8],[15]   $ 13,320
Investment, cost [8],[15]   13,005
Total Level 3 investments [8],[15]   $ 13,005
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 7.25%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (57)  
Total Level 3 investments [7],[25],[26],[27] $ (57)  
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 12.17%  
Spread [7],[25],[26] 7.25%  
Principal [7],[25],[26] $ 29,071  
Investment, cost [7],[25],[26] 27,927  
Total Level 3 investments [7],[25],[26] $ 27,927  
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 13.23% [7],[26] 10.00% [8],[15]
Spread 8.50% [7],[26] 8.50% [8],[15]
Principal $ 1,678 [7],[26] $ 12,111 [8],[15]
Investment, cost 1,669 [7],[26] 12,005 [8],[15]
Total Level 3 investments $ 1,678 [7],[26] $ 12,111 [8],[15]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.23% [7],[26] 14.00% [8],[15]
Spread 8.50% [7],[26] 12.50% [8],[15]
Principal $ 9,891 [7],[26] $ 850 [8],[15]
Investment, cost 9,825 [7],[26] 841 [8],[15]
Total Level 3 investments $ 9,891 [7],[26] $ 850 [8],[15]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 16.17%  
Spread [7],[26] 12.50%  
Principal [7],[26] $ 807  
Investment, cost [7],[26] 800  
Total Level 3 investments [7],[26] $ 807  
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 13.88%  
Spread [7],[26] 9.50%  
Principal [7],[26] $ 14,618  
Investment, cost [7],[26] 14,291  
Total Level 3 investments [7],[26] $ 14,618  
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 13.57%  
Spread [7],[26] 9.00%  
Principal [7],[26] $ 4,368  
Investment, cost [7],[26] 4,270  
Total Level 3 investments [7],[26] $ 4,368  
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26],[32] 10.00%  
Spread [7],[26],[32] 6.00%  
Principal [7],[26],[32] $ 4,729  
Investment, cost [7],[26],[32] 4,729  
Total Level 3 investments [7],[26],[32] $ 4,729  
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26],[32] 10.00%  
Spread [7],[26],[32] 7.50%  
Principal [7],[26],[32] $ 24,086  
Investment, cost [7],[26],[32] 24,033  
Total Level 3 investments [7],[26],[32] $ 24,086  
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.00%
Spread [8],[15]   6.00%
Principal [8],[15]   $ 7,067
Investment, cost [8],[15]   6,988
Total Level 3 investments [8],[15]   $ 6,988
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 6.00%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (10)  
Total Level 3 investments [7],[26],[27] $ (10)  
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.12%  
Spread [7],[26] 6.00%  
Principal [7],[26] $ 6,617  
Investment, cost [7],[26] 6,565  
Total Level 3 investments [7],[26] $ 6,617  
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   9.00%
Spread [8],[15]   8.00%
Principal [8],[15]   $ 12,017
Investment, cost [8],[15]   11,854
Total Level 3 investments [8],[15]   $ 12,017
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.46%  
Spread [7],[25],[26] 6.75%  
Principal [7],[25],[26] $ 15,628  
Investment, cost [7],[25],[26] 15,408  
Total Level 3 investments [7],[25],[26] $ 14,606  
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 12.46%  
Spread [7],[25],[26] 8.75%  
Principal [7],[25],[26] $ 15,628  
Investment, cost [7],[25],[26] 15,408  
Total Level 3 investments [7],[25],[26] $ 14,654  
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 7.50% [13],[31] 7.50% [14],[15],[30],[33]
Spread 6.50% [13],[31] 6.50% [14],[15],[30],[33]
Principal $ 2,980 [13],[31] $ 2,980 [14],[15],[30],[33]
Investment, cost 2,980 [13],[31] 2,980 [14],[15],[30],[33]
Total Level 3 investments $ 168 [13],[31] $ 89 [14],[15],[30],[33]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 7.50% [13],[26],[31] 7.50% [14],[15],[30]
Spread 6.50% [13],[26],[31] 6.50% [14],[15],[30]
Principal $ 14,370 [13],[26],[31] $ 14,370 [14],[15],[30]
Investment, cost 13,706 [13],[26],[31] 13,706 [14],[15],[30]
Total Level 3 investments $ 808 [13],[26],[31] $ 431 [14],[15],[30]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 3,200 3,200
Total Rate 14.13%  
Investment, cost $ 3,200 $ 3,200
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 2,427 2,427
Investment, cost $ 2,427 $ 2,427
Total Level 3 investments $ 3,504 $ 4,894
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   12.00%
Spread [15]   10.00%
Principal [15]   $ 4,945
Investment, cost [15]   4,736
Total Level 3 investments [15]   $ 4,736
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27] 10.00%  
Principal [26],[27] $ 0  
Investment, cost [26],[27] (3)  
Total Level 3 investments [26],[27] $ (3)  
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 14.13%  
Spread [26] 10.00%  
Principal [26] $ 4,665  
Investment, cost [26] 4,545  
Total Level 3 investments [26] $ 4,545  
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 420 [23] 420 [24]
Investment, cost $ 316 [23] $ 316 [24]
Total Level 3 investments $ 0 [23] $ 0 [24]
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 234 [7] 234 [8]
Investment, cost $ 234 [7] $ 234 [8]
Total Level 3 investments $ 0 [7] $ 234 [8]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.00%
Spread [8],[15]   7.00%
Principal [8],[15]   $ 32,605
Investment, cost [8],[15]   31,873
Total Level 3 investments [8],[15]   $ 31,873
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 13.41%  
Spread [7],[26] 9.00%  
Principal [7],[26] $ 4,678  
Investment, cost [7],[26] 4,569  
Total Level 3 investments [7],[26] $ 3,945  
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 13.56%  
Spread [7],[26] 9.00%  
Principal [7],[26] $ 29,722  
Investment, cost [7],[26] 29,261  
Total Level 3 investments [7],[26] $ 25,065  
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [7] 1,387,832  
Investment, cost [7] $ 1,388  
Total Level 3 investments [7] $ 1,388  
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 6.50%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (135)  
Total Level 3 investments [7],[25],[26],[27] $ (135)  
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.92%  
Spread [7],[25],[26] 6.50%  
Principal [7],[25],[26] $ 67,597  
Investment, cost [7],[25],[26] 66,330  
Total Level 3 investments [7],[25],[26] $ 66,511  
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.36% [7],[25],[26],[34] 9.18% [8],[15],[35]
Spread 6.60% [7],[25],[26],[34] 7.93% [8],[15],[35]
Principal $ 36,000 [7],[25],[26],[34] $ 22,500 [8],[15],[35]
Investment, cost 35,737 [7],[25],[26],[34] 22,300 [8],[15],[35]
Total Level 3 investments $ 36,000 [7],[25],[26],[34] $ 22,500 [8],[15],[35]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 800,000 800,000
Investment, cost $ 800 $ 800
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)    
Schedule of Investments [Line Items]    
Total Rate 15.00% 15.00% [29]
PIK Rate [29]   15.00%
Investment, cost $ 162 $ 162 [29]
Total Level 3 investments $ 0 $ 0 [29]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt    
Schedule of Investments [Line Items]    
Total Rate [15],[33]   12.00%
Spread [15],[33]   11.00%
Principal [15],[33]   $ 4,800
Investment, cost [15],[33]   4,800
Total Level 3 investments [15],[33]   $ 2,508
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [26],[36] 15.12%  
Spread [26],[36] 11.00%  
Principal [26],[36] $ 800  
Investment, cost [26],[36] 800  
Total Level 3 investments [26],[36] $ 800  
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26],[36] 15.12%  
Spread [26],[36] 11.00%  
Principal [26],[36] $ 4,000  
Investment, cost [26],[36] 4,000  
Total Level 3 investments [26],[36] $ 2,086  
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 37 [7] 37 [8]
Investment, cost $ 1,584 [7] $ 1,584 [8]
Total Level 3 investments $ 3,320 [7] $ 1,930 [8]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 7.00% [7] 7.00% [8]
Principal $ 711 [7] $ 711 [8]
Investment, cost 711 [7] 711 [8]
Total Level 3 investments $ 711 [7] $ 711 [8]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) [28] 4,073  
Investment, cost [28] $ 4,095  
Total Level 3 investments [28] 4,095  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] (8)  
Total Level 3 investments [27] (8)  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] 0  
Total Level 3 investments [27] $ 0  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 11.00%  
Principal $ 11,025  
Investment, cost 10,933  
Total Level 3 investments $ 10,933  
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 1,548,387 [7],[28],[37] 122,416 [8],[29],[38]
Total Rate 8.00% [7],[28],[37] 16.00% [8],[29],[38]
PIK Rate 8.00% [7],[28],[37] 16.00% [8],[29],[38]
Investment, cost $ 1,161 [7],[28],[37] $ 168 [8],[29],[38]
Total Level 3 investments $ 4,561 [7],[28],[37] $ 208 [8],[29],[38]
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 122,416 [7],[27],[28],[37] 1,548,387 [8],[38]
Total Rate [8],[38]   8.00%
PIK Rate 16.00% [7],[27],[28],[37] 8.00% [8],[38]
Investment, cost $ 0 [7],[27],[28],[37] $ 1,671 [8],[38]
Total Level 3 investments $ 270 [7],[27],[28],[37] $ 2,487 [8],[38]
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% [7] 12.00% [8]
Spread [7] 10.50%  
PIK Rate 1.50% [7] 1.50% [8]
Principal $ 195 [7] $ 4,694 [8]
Investment, cost 195 [7] 4,674 [8]
Total Level 3 investments $ 195 [7] $ 4,694 [8]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 1.00%  
PIK Rate [7],[25],[26],[27] 6.00%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (76)  
Total Level 3 investments [7],[25],[26],[27] $ (76)  
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.40%  
Spread [7],[25],[26] 1.00%  
PIK Rate [7],[25],[26] 6.00%  
Principal [7],[25],[26] $ 27,505  
Investment, cost [7],[25],[26] 27,020  
Total Level 3 investments [7],[25],[26] $ 27,505  
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,050,000 [7] 1,050,000 [8]
Investment, cost $ 1,050 [7] $ 1,050 [8]
Total Level 3 investments $ 420 [7] $ 730 [8]
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   9.50%
Spread [8],[15]   8.50%
Principal [8],[15]   $ 12,194
Investment, cost [8],[15]   12,107
Total Level 3 investments [8],[15]   $ 12,194
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 723,184 [13],[28] 723,184 [14],[29]
Investment, cost $ 1 [13],[28] $ 1 [14],[29]
Total Level 3 investments $ 4,860 [13],[28] $ 1,515 [14],[29]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   10.00%
Spread [14],[15]   8.50%
Principal [14],[15]   $ 5,357
Investment, cost [14],[15]   5,357
Total Level 3 investments [14],[15]   $ 5,337
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [13],[26],[27] 8.50%  
Principal [13],[26],[27] $ 0  
Investment, cost [13],[26],[27] 0  
Total Level 3 investments [13],[26],[27] $ 0  
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [13],[26] 12.94%  
Spread [13],[26] 8.50%  
Principal [13],[26] $ 3,239  
Investment, cost [13],[26] 2,280  
Total Level 3 investments [13],[26] $ 3,139  
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants    
Schedule of Investments [Line Items]    
Units (in shares) [13],[23] 163,295  
Investment, cost [13],[23] $ 1,036  
Total Level 3 investments [13],[23] $ 1,095  
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 2,160,000 [28] 2,160,000 [29]
Investment, cost $ 2,256 [28] $ 2,256 [29]
Total Level 3 investments $ 2,970 [28] $ 4,830 [29]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.00% 10.00%
Principal $ 320 $ 320
Investment, cost 320 320
Total Level 3 investments $ 320 $ 320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class A Preferred Member Units    
Schedule of Investments [Line Items]    
Total Rate [29]   14.00%
Investment, cost [29]   $ 10,194
Total Level 3 investments [29]   $ 10,194
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 140,000 [28] 140,000 [29]
Total Rate 8.00% [28] 8.00% [29]
Investment, cost $ 14,000 [28] $ 14,000 [29]
Total Level 3 investments $ 31,420 [28] $ 23,170 [29]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 13.39% [25],[26],[39] 10.50% [15]
Spread 9.26% [25],[26],[39] 9.00% [15]
Principal $ 99,194 [25],[26],[39] $ 39,000 [15]
Investment, cost 98,576 [25],[26],[39] 38,687 [15]
Total Level 3 investments $ 99,194 [25],[26],[39] $ 39,000 [15]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15],[30],[33]   12.50%
Spread [8],[15],[30],[33]   9.25%
Principal [8],[15],[30],[33]   $ 7,817
Investment, cost [8],[15],[30],[33]   7,817
Total Level 3 investments [8],[15],[30],[33]   $ 4,201
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26],[31],[36] 12.50%  
Spread [7],[26],[31],[36] 9.25%  
Principal [7],[26],[31],[36] $ 761  
Investment, cost [7],[26],[31],[36] 761  
Total Level 3 investments [7],[26],[31],[36] $ 761  
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26],[31],[36] 12.50%  
Spread [7],[26],[31],[36] 9.25%  
Principal [7],[26],[31],[36] $ 7,056  
Investment, cost [7],[26],[31],[36] 7,056  
Total Level 3 investments [7],[26],[31],[36] $ 2,916  
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 2,950 [28] 2,950 [29]
Investment, cost $ 4,280 [28] $ 4,280 [29]
Total Level 3 investments $ 7,080 [28] $ 7,710 [29]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 14.12% [26] 11.00% [15]
Spread 10.00% [26] 10.00% [15]
Principal $ 5,964 [26] $ 8,060 [15]
Investment, cost 5,964 [26] 8,037 [15]
Total Level 3 investments $ 5,964 [26] $ 8,037 [15]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 17,742 [28],[37] 17,742 [29],[38]
Investment, cost $ 1,000 [28],[37] $ 1,000 [29],[38]
Total Level 3 investments $ 1,000 [28],[37] $ 1,000 [29],[38]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 13.00% 13.00%
Principal $ 8,813 $ 8,813
Investment, cost 8,813 8,813
Total Level 3 investments $ 8,813 $ 8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.00% [37] 13.00% [38]
Principal $ 1,000 [37] $ 1,000 [38]
Investment, cost 1,000 [37] 1,000 [38]
Total Level 3 investments $ 1,000 [37] $ 1,000 [38]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 82 [23] 82 [24]
Investment, cost $ 2,132 [23] $ 2,132 [24]
Total Level 3 investments $ 4,340 [23] $ 4,060 [24]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 1.55% [9],[10],[28],[40] 1.60% [11],[12],[29],[41]
Investment, cost $ 7,062 [9],[10],[28],[40] $ 7,200 [11],[12],[29],[41]
Total Level 3 investments $ 4,727 [9],[10],[28],[40] $ 4,269 [11],[12],[29],[41]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 0.59% [9],[10],[28],[40] 0.60% [11],[12],[29],[41]
Investment, cost $ 4,350 [9],[10],[28],[40] $ 4,350 [11],[12],[29],[41]
Total Level 3 investments $ 4,541 [9],[10],[28],[40] $ 4,394 [11],[12],[29],[41]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 1.31% [9],[10],[40] 15.80% [11],[12],[41]
Investment, cost $ 2,000 [9],[10],[40] $ 1,000 [11],[12],[41]
Total Level 3 investments $ 2,229 [9],[10],[40] $ 1,000 [11],[12],[41]
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 6 6
Total Rate 6.00% 6.00%
PIK Rate 6.00% 6.00%
Investment, cost $ 4,770 $ 4,770
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.00% 10.25% [15],[33]
Spread [15],[33]   9.25%
Principal $ 17,355 $ 19,491 [15],[33]
Investment, cost 17,355 19,491 [15],[33]
Total Level 3 investments $ 12,337 $ 14,370 [15],[33]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   6.00%
Spread 5.00% [7],[26],[27] 5.00% [8],[15]
Principal $ 0 [7],[26],[27] $ 465 [8],[15]
Investment, cost (28) [7],[26],[27] 429 [8],[15]
Total Level 3 investments $ 0 [7],[26],[27] $ 429 [8],[15]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 8.91% [7],[26] 6.00% [8],[15]
Spread 5.00% [7],[26] 5.00% [8],[15]
Principal $ 19,933 [7],[26] $ 20,134 [8],[15]
Investment, cost 19,656 [7],[26] 19,803 [8],[15]
Total Level 3 investments $ 19,933 [7],[26] $ 19,985 [8],[15]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1    
Schedule of Investments [Line Items]    
Units (in shares) 1,788,527 [28] 1,788,527
Investment, cost $ 1,789 [28] $ 1,789
Total Level 3 investments $ 1,789 [28] $ 1,789
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2    
Schedule of Investments [Line Items]    
Units (in shares) 596,176 596,176
Investment, cost $ 0 $ 0
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 416 [28] 416 [29]
Investment, cost $ 1,300 [28] $ 1,300 [29]
Total Level 3 investments $ 49,002 [28] $ 50,620 [29]
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 100 [28],[37] 100 [29],[38]
Investment, cost $ 1,304 [28],[37] $ 1,838 [29],[38]
Total Level 3 investments $ 1,670 [28],[37] $ 1,974 [29],[38]
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 11.99% [7],[26],[42] 9.28% [8],[43]
Spread [7],[26],[42] 8.50%  
PIK Rate 0.01% [7],[26],[42] 0.22% [8],[43]
Principal $ 28,328 [7],[26],[42] $ 28,540 [8],[43]
Investment, cost 28,264 [7],[26],[42] 28,399 [8],[43]
Total Level 3 investments $ 28,328 [7],[26],[42] $ 26,767 [8],[43]
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,233 [28] 1,233 [29]
Investment, cost $ 1,742 [28] $ 1,742 [29]
Total Level 3 investments $ 2,210 [28] $ 2,570 [29]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 6,157 [28] 6,725 [29]
Total Rate [29]   15.00%
PIK Rate [29]   15.00%
Investment, cost $ 10,775 [28] $ 9,510 [29]
Total Level 3 investments $ 25,495 [28] $ 9,510 [29]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 3,671 [28] 6,157 [29]
Total Rate [28] 15.00%  
PIK Rate [28] 15.00%  
Investment, cost $ 3,994 [28] $ 10,775 [29]
Total Level 3 investments $ 3,994 [28] $ 13,275 [29]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 13.75% [26] 11.00% [15]
Spread 10.00% [26] 10.00% [15]
Principal $ 28,000 [26] $ 28,000 [15]
Investment, cost 27,951 [26] 27,915 [15]
Total Level 3 investments $ 28,000 [26] $ 27,915 [15]
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.88% [13],[26] 7.50% [14],[15]
Spread 6.50% [13],[26] 6.50% [14],[15]
Principal $ 15,218 [13],[26] $ 15,920 [14],[15]
Investment, cost 15,110 [13],[26] 15,775 [14],[15]
Total Level 3 investments $ 14,685 [13],[26] $ 15,840 [14],[15]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Class A Common Units    
Schedule of Investments [Line Items]    
Units (in shares)   450,000
Investment, cost   $ 4,500
Total Level 3 investments   $ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 450,000  
Investment, cost $ 4,500  
Total Level 3 investments $ 4,500  
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   12.50%
Principal   $ 20,250
Investment, cost   20,050
Total Level 3 investments   $ 20,050
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27] 6.00%  
Principal [26],[27] $ 0  
Investment, cost [26],[27] (9)  
Total Level 3 investments [26],[27] $ (9)  
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.50%  
Principal $ 20,250  
Investment, cost 20,090  
Total Level 3 investments $ 20,090  
Investment, Identifier [Axis]: CaseWorthy, Inc., Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) [7] 245,926  
Investment, cost [7] $ 246  
Total Level 3 investments [7] $ 246  
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 6.00%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (11)  
Total Level 3 investments [7],[26],[27] $ (11)  
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.73%  
Spread [7],[26] 6.00%  
Principal [7],[26] $ 7,993  
Investment, cost [7],[26] 7,914  
Total Level 3 investments [7],[26] $ 7,914  
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.48%  
Spread [7],[26] 5.75%  
Principal [7],[26] $ 6,133  
Investment, cost [7],[26] 6,079  
Total Level 3 investments [7],[26] $ 6,133  
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 13,309 12,696
Investment, cost $ 6,122 $ 5,840
Total Level 3 investments $ 8,700 $ 5,840
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   12.00%
Spread [15]   10.00%
Principal [15]   $ 9,416
Investment, cost [15]   9,370
Total Level 3 investments [15]   $ 8,864
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27] 9.00%  
Principal [26],[27] $ 0  
Investment, cost [26],[27] 0  
Total Level 3 investments [26],[27] $ 0  
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 13.13%  
Spread [26] 9.00%  
Principal [26] $ 15,030  
Investment, cost [26] 14,954  
Total Level 3 investments [26] $ 14,954  
Investment, Identifier [Axis]: Cenveo Corporation, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [14]   322,907
Investment, cost [14]   $ 6,183
Total Level 3 investments [14]   $ 2,852
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 4,347 [28] 4,347 [29]
Investment, cost $ 11,440 [28] $ 11,440 [29]
Total Level 3 investments $ 22,920 [28] $ 24,140 [29]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 1,047,146 [28],[37] 1,047,146 [29],[38]
Investment, cost $ 1,773 [28],[37] $ 1,322 [29],[38]
Total Level 3 investments $ 2,710 [28],[37] $ 1,540 [29],[38]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   9.00%
Spread [15]   8.00%
Principal [15]   $ 17,817
Investment, cost [15]   17,738
Total Level 3 investments [15]   $ 17,817
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27] 6.00%  
Principal [26],[27] $ 0  
Investment, cost [26],[27] 0  
Total Level 3 investments [26],[27] $ 0  
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 12.13%  
Spread [26] 8.00%  
Principal [26] $ 16,945  
Investment, cost [26] 16,935  
Total Level 3 investments [26] $ 16,945  
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,500,000 [7] 1,500,000 [8]
Investment, cost $ 1,500 [7] $ 1,500 [8]
Total Level 3 investments $ 1,790 [7] $ 460 [8]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26],[44] 10.72%  
Spread [7],[25],[26],[44] 6.25%  
Principal [7],[25],[26],[44] $ 1,868  
Investment, cost [7],[25],[26],[44] 1,767  
Total Level 3 investments [7],[25],[26],[44] $ 1,841  
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26],[45] 10.71%  
Spread [7],[25],[26],[45] 6.25%  
Principal [7],[25],[26],[45] $ 39,047  
Investment, cost [7],[25],[26],[45] 38,396  
Total Level 3 investments [7],[25],[26],[45] $ 38,484  
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,829 [28] 1,829 [29]
Investment, cost $ 1,963 [28] $ 1,963 [29]
Total Level 3 investments $ 13,340 [28] $ 13,990 [29]
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.00% 10.00%
Principal $ 5,694 $ 5,694
Investment, cost 4,643 4,599
Total Level 3 investments $ 5,694 $ 5,694
Investment, Identifier [Axis]: Chisholm Energy Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.75%
Spread [8],[15]   6.25%
Principal [8],[15]   $ 2,857
Investment, cost [8],[15]   2,804
Total Level 3 investments [8],[15]   $ 2,663
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 717 [28] 717 [29]
Investment, cost $ 7,280 [28] $ 7,280 [29]
Total Level 3 investments $ 8,220 [28] $ 10,250 [29]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 800 [37] 800 [38]
Investment, cost $ 210 [37] $ 210 [38]
Total Level 3 investments $ 610 [37] $ 530 [38]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [15]   10.50%
Spread 9.00% [25],[26],[27] 9.50% [15]
Principal $ 0 [25],[26],[27] $ 10,480 [15]
Investment, cost 0 [25],[26],[27] 10,401 [15]
Total Level 3 investments $ 0 [25],[26],[27] $ 10,401 [15]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.23% [25],[26] 10.00%
Spread [25],[26] 9.00%  
Principal $ 10,480 [25],[26] $ 1,081
Investment, cost 10,440 [25],[26] 1,071
Total Level 3 investments $ 10,440 [25],[26] $ 1,071
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 10.00%  
Principal $ 1,049  
Investment, cost 1,039  
Total Level 3 investments $ 1,039  
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 15.00% [7],[31],[36] 15.00% [8],[30],[33]
PIK Rate 15.00% [7],[31],[36] 15.00% [8],[30],[33]
Principal $ 2,712 [7],[31],[36] $ 2,756 [8],[30],[33]
Investment, cost 2,712 [7],[31],[36] 2,756 [8],[30],[33]
Total Level 3 investments $ 19 [7],[31],[36] $ 33 [8],[30],[33]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 154 [28] 154 [29]
Investment, cost $ 5,760 [28] $ 5,760 [29]
Total Level 3 investments $ 24,637 [28] $ 15,260 [29]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 9.75% [26] 7.00% [15]
Spread 6.00% [26] 6.00% [15]
Principal $ 4,560 [26] $ 4,000 [15]
Investment, cost 4,560 [26] 4,000 [15]
Total Level 3 investments $ 4,560 [26] $ 4,000 [15]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 8.00% 8.00%
Principal $ 19,274 $ 19,274
Investment, cost 19,182 19,139
Total Level 3 investments $ 19,274 $ 19,274
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 587 [28],[37] 587 [29],[38]
Investment, cost $ 8,317 [28],[37] $ 8,317 [29],[38]
Total Level 3 investments $ 58,180 [28],[37] $ 47,640 [29],[38]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   12.25%
Spread [15]   10.50%
Principal [15]   $ 42,497
Investment, cost [15]   42,117
Total Level 3 investments [15]   $ 42,484
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [26] 15.38%  
Spread [26] 10.50%  
Principal [26] $ 1,462  
Investment, cost [26] 1,443  
Total Level 3 investments [26] $ 1,462  
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 15.38%  
Spread [26] 10.50%  
Principal [26] $ 40,801  
Investment, cost [26] 40,521  
Total Level 3 investments [26] $ 40,801  
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 17,280 [28] 17,280
Investment, cost $ 7,680 [28] $ 7,680
Total Level 3 investments 9,160 [28] $ 9,130
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   12.00%
Principal   $ 24,570
Investment, cost   24,351
Total Level 3 investments   $ 24,351
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal 0  
Investment, cost 0  
Total Level 3 investments $ 0  
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00%  
Principal $ 23,310  
Investment, cost 23,151  
Total Level 3 investments $ 23,151  
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,975 [28] 1,975 [29]
Investment, cost $ 1,975 [28] $ 1,975 [29]
Total Level 3 investments $ 19,830 [28] $ 12,000 [29]
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   10.00%
Spread [15]   9.00%
Principal [15]   $ 6,477
Investment, cost [15]   6,452
Total Level 3 investments [15]   $ 6,477
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27],[36] 9.00%  
Principal [26],[27],[36] $ 0  
Investment, cost [26],[27],[36] 0  
Total Level 3 investments [26],[27],[36] $ 0  
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 13.13%  
Spread [26] 9.00%  
Principal [26] $ 5,241  
Investment, cost [26] 5,232  
Total Level 3 investments [26] $ 5,241  
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.50%
Spread [8],[15]   7.50%
Principal [8],[15]   $ 21,681
Investment, cost [8],[15]   21,234
Total Level 3 investments [8],[15]   $ 21,234
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26],[46] 12.56%  
Spread [7],[26],[46] 8.00%  
Principal [7],[26],[46] $ 5,000  
Investment, cost [7],[26],[46] 4,928  
Total Level 3 investments [7],[26],[46] $ 4,621  
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 12.56%  
Spread [7],[26] 8.00%  
Principal [7],[26] $ 18,588  
Investment, cost [7],[26] 18,315  
Total Level 3 investments [7],[26] $ 17,178  
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)    
Schedule of Investments [Line Items]    
Units (percentage) [9],[10],[28],[40] 13.32%  
Investment, cost [9],[10],[28],[40] $ 8,096  
Total Level 3 investments [9],[10],[28],[40] $ 7,657  
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)    
Schedule of Investments [Line Items]    
Units (percentage) [11],[12],[29],[41]   17.40%
Investment, cost [11],[12],[29],[41]   $ 10,256
Total Level 3 investments [11],[12],[29],[41]   $ 9,959
Investment, Identifier [Axis]: Construction Supply Investments, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 861,618 [7],[28] 861,618 [8],[29]
Investment, cost $ 3,335 [7],[28] $ 3,335 [8],[29]
Total Level 3 investments $ 21,165 [7],[28] $ 14,640 [8],[29]
Investment, Identifier [Axis]: Copper Trail Fund Investments, LP Interests (CTMH, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 38.75% [9],[10],[40] 38.80% [11],[12],[41]
Investment, cost $ 588 [9],[10],[40] $ 710 [11],[12],[41]
Total Level 3 investments $ 588 [9],[10],[40] $ 710 [11],[12],[41]
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 5,944 5,944
Investment, cost $ 5,944 $ 5,944
Total Level 3 investments $ 7,260 $ 5,944
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 21,200 $ 21,200
Investment, cost 21,035 20,993
Total Level 3 investments $ 21,200 $ 20,993
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 776,316 [7] 776,316 [8]
Total Rate 8.00% [7] 8.00% [8]
PIK Rate 8.00% [7] 8.00% [8]
Investment, cost $ 776 [7] $ 776 [8]
Total Level 3 investments $ 380 [7] $ 320 [8]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)    
Schedule of Investments [Line Items]    
Total Rate 10.00% [7],[28] 10.00% [8],[15]
PIK Rate 10.00% [7],[28] 10.00% [8],[15]
Investment, cost $ 1,161 [7],[28] $ 1,051 [8],[15]
Total Level 3 investments $ 1,161 [7],[28] $ 1,051 [8],[15]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   9.50%
Spread [8],[15]   8.00%
Principal [8],[15]   $ 9,324
Investment, cost [8],[15]   9,259
Total Level 3 investments [8],[15]   $ 8,884
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 7.50%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (1)  
Total Level 3 investments [7],[26],[27] $ (1)  
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 12.24%  
Spread [7],[26] 7.50%  
Principal [7],[26] $ 6,074  
Investment, cost [7],[26] 6,065  
Total Level 3 investments [7],[26] $ 5,934  
Investment, Identifier [Axis]: Dalton US Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [7] 201  
Investment, cost [7] $ 201  
Total Level 3 investments [7] $ 201  
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.90%  
Spread [7],[25],[26] 8.00%  
Principal [7],[25],[26] $ 1,092  
Investment, cost [7],[25],[26] 871  
Total Level 3 investments [7],[25],[26] $ 1,077  
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 8.00%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (74)  
Total Level 3 investments [7],[26],[27] $ (74)  
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 12.56%  
Spread [7],[25],[26] 8.00%  
Principal [7],[25],[26] $ 14,389  
Investment, cost [7],[25],[26] 14,125  
Total Level 3 investments [7],[25],[26] $ 14,186  
Investment, Identifier [Axis]: Darr Equipment LP, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8]   12.50%
PIK Rate [8]   1.00%
Principal [8]   $ 4,685
Investment, cost [8]   4,685
Total Level 3 investments [8]   $ 4,227
Investment, Identifier [Axis]: Darr Equipment LP, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) [8],[47]   915,734
Investment, cost [8],[47]   $ 474
Total Level 3 investments [8],[47]   $ 160
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 9,000 [28] 9,000
Investment, cost $ 2,610 [28] $ 2,610
Total Level 3 investments $ 2,670 [28] $ 2,610
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   5.00%
Principal   $ 8,892
Investment, cost   8,296
Total Level 3 investments   $ 7,668
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 7.50%  
Principal $ 223  
Investment, cost 223  
Total Level 3 investments $ 223  
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 7.50%  
Principal $ 8,622  
Investment, cost 8,190  
Total Level 3 investments $ 7,789  
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 3,857 [28] 3,857 [29]
Investment, cost $ 9,501 [28] $ 9,501 [29]
Total Level 3 investments $ 9,835 [28] $ 9,835 [29]
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 14.13% [26] 11.00% [15]
Spread 10.00% [26] 10.00% [15]
Principal $ 15,533 [26] $ 16,853 [15]
Investment, cost 15,523 [26] 16,801 [15]
Total Level 3 investments $ 15,523 [26] $ 16,801 [15]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 8,400 [28] 8,400 [29]
Investment, cost $ 8,400 [28] $ 8,400 [29]
Total Level 3 investments $ 22,220 [28] $ 18,350 [29]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   12.00%
Spread [15]   11.00%
Principal [15]   $ 24,070
Investment, cost [15]   23,911
Total Level 3 investments [15]   $ 24,048
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27] 11.00%  
Principal [26],[27] $ 0  
Investment, cost [26],[27] (88)  
Total Level 3 investments [26],[27] $ 0  
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 15.13%  
Spread [26] 11.00%  
Principal [26] $ 27,267  
Investment, cost [26] 27,122  
Total Level 3 investments [26] $ 27,267  
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 6.43% [9],[10],[40] 6.40% [11],[12],[41]
Investment, cost $ 2,051 [9],[10],[40] $ 2,097 [11],[12],[41]
Total Level 3 investments $ 2,898 [9],[10],[40] $ 3,280 [11],[12],[41]
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 20.24% [9],[10],[40] 20.20% [11],[12],[41]
Investment, cost $ 6,459 [9],[10],[40] $ 6,605 [11],[12],[41]
Total Level 3 investments $ 9,127 [9],[10],[40] $ 10,329 [11],[12],[41]
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units    
Schedule of Investments [Line Items]    
Units (in shares) 2,000,000 [7],[37] 2,000,000 [8],[38]
Investment, cost $ 2,000 [7],[37] $ 2,000 [8],[38]
Total Level 3 investments $ 1,330 [7],[37] $ 640 [8],[38]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) [7] 1,250,000  
Investment, cost [7] $ 0  
Total Level 3 investments [7] $ 0  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 1    
Schedule of Investments [Line Items]    
Units (in shares) [7] 125,000  
Investment, cost [7] $ 128  
Total Level 3 investments [7] $ 128  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 2    
Schedule of Investments [Line Items]    
Units (in shares) [7] 2,376,241  
Investment, cost [7] $ 0  
Total Level 3 investments [7] $ 0  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   9.50%
Spread [8],[15]   8.50%
Principal [8],[15]   $ 5,681
Investment, cost [8],[15]   5,638
Total Level 3 investments [8],[15]   $ 5,569
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 9.18%  
Spread [7],[25],[26] 4.50%  
PIK Rate [7],[25],[26] 9.18%  
Principal [7],[25],[26] $ 1,875  
Investment, cost [7],[25],[26] 1,717  
Total Level 3 investments [7],[25],[26] $ 1,717  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.18%  
Spread [7],[25],[26] 6.50%  
PIK Rate [7],[25],[26] 11.18%  
Principal [7],[25],[26] $ 1,875  
Investment, cost [7],[25],[26] 1,642  
Total Level 3 investments [7],[25],[26] $ 1,642  
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)    
Schedule of Investments [Line Items]    
Units (in shares) 5,000,000 [9],[10],[28],[40] 5,000,000 [11],[12],[29],[41]
Investment, cost $ 1,060 [9],[10],[28],[40] $ 594 [11],[12],[29],[41]
Total Level 3 investments $ 1,013 [9],[10],[28],[40] $ 547 [11],[12],[29],[41]
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   7.00%
Spread [14],[15]   6.00%
Principal [14],[15]   $ 6,892
Investment, cost [14],[15]   6,819
Total Level 3 investments [14],[15]   $ 5,862
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.00%
Spread [8],[15]   7.00%
Principal [8],[15]   $ 31,810
Investment, cost [8],[15]   31,238
Total Level 3 investments [8],[15]   $ 31,810
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.73%  
Spread [7],[26] 7.00%  
Principal [7],[26] $ 3,346  
Investment, cost [7],[26] 3,290  
Total Level 3 investments [7],[26] $ 3,276  
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.73%  
Spread [7],[26] 7.00%  
Principal [7],[26] $ 5,021  
Investment, cost [7],[26] 4,967  
Total Level 3 investments [7],[26] $ 4,916  
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.73%  
Spread [7],[26] 7.00%  
Principal [7],[26] $ 23,456  
Investment, cost [7],[26] 23,149  
Total Level 3 investments [7],[26] $ 22,967  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1    
Schedule of Investments [Line Items]    
Units (in shares) 378  
Investment, cost $ 7,603  
Total Level 3 investments $ 7,603  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2    
Schedule of Investments [Line Items]    
Units (in shares) [37] 939  
Investment, cost [37] $ 1,558  
Total Level 3 investments [37] $ 1,558  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [25],[26],[27] 6.00%  
Principal [25],[26],[27] $ 0  
Investment, cost [25],[26],[27] (9)  
Total Level 3 investments [25],[26],[27] $ (9)  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00%  
Principal $ 18,773  
Investment, cost 18,594  
Total Level 3 investments $ 18,594  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 9.00%  
Principal $ 6,357  
Investment, cost 6,294  
Total Level 3 investments $ 6,294  
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [13],[25],[26] 10.67%  
Spread [13],[25],[26] 6.25%  
Principal [13],[25],[26] $ 9,258  
Investment, cost [13],[25],[26] 9,099  
Total Level 3 investments [13],[25],[26] $ 8,787  
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) 0.10% [9],[10],[28],[40] 0.10% [11],[12],[29],[41]
Investment, cost $ 3,699 [9],[10],[28],[40] $ 4,047 [11],[12],[29],[41]
Total Level 3 investments $ 2,019 [9],[10],[28],[40] $ 2,284 [11],[12],[29],[41]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co- Investors, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [11],[12],[41]   0.40%
Investment, cost [11],[12],[41]   $ 2,097
Total Level 3 investments [11],[12],[41]   $ 777
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [9],[10],[28],[40] 0.38%  
Investment, cost [9],[10],[28],[40] $ 1,984  
Total Level 3 investments [9],[10],[28],[40] $ 1,037  
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) 0.14% [9],[10],[28],[40] 0.10% [11],[12],[29],[41]
Investment, cost $ 3,566 [9],[10],[28],[40] $ 3,745 [11],[12],[29],[41]
Total Level 3 investments $ 2,092 [9],[10],[28],[40] $ 1,599 [11],[12],[29],[41]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) 0.15% [9],[10],[28],[40] 0.10% [11],[12],[29],[41]
Investment, cost $ 8,236 [9],[10],[28],[40] $ 8,443 [11],[12],[29],[41]
Total Level 3 investments $ 9,351 [9],[10],[28],[40] $ 8,276 [11],[12],[29],[41]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) 0.84% [9],[10],[40] 0.80% [11],[12],[41]
Investment, cost $ 5,358 [9],[10],[40] $ 6,582 [11],[12],[41]
Total Level 3 investments $ 1,688 [9],[10],[40] $ 2,796 [11],[12],[41]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) 0.25% [9],[10],[28],[40] 0.20% [11],[12],[29],[41]
Investment, cost $ 6,023 [9],[10],[28],[40] $ 6,082 [11],[12],[29],[41]
Total Level 3 investments $ 5,718 [9],[10],[28],[40] $ 5,064 [11],[12],[29],[41]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.68%  
Spread [7],[25],[26] 6.50%  
Principal [7],[25],[26] $ 131  
Investment, cost [7],[25],[26] 85  
Total Level 3 investments [7],[25],[26] $ 131  
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.92%  
Spread [7],[25],[26] 6.50%  
Principal [7],[25],[26] $ 16,338  
Investment, cost [7],[25],[26] 16,047  
Total Level 3 investments [7],[25],[26] $ 16,338  
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15],[38]   8.00%
Spread [8],[15],[38]   7.00%
Principal [8],[15],[38]   $ 51,692
Investment, cost [8],[15],[38]   51,135
Total Level 3 investments [8],[15],[38]   $ 51,135
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26],[37] 10.67%  
Spread [7],[26],[37] 7.00%  
Principal [7],[26],[37] $ 3,692  
Investment, cost [7],[26],[37] 3,663  
Total Level 3 investments [7],[26],[37] $ 3,507  
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26],[37] 10.67%  
Spread [7],[26],[37] 7.00%  
Principal [7],[26],[37] $ 44,308  
Investment, cost [7],[26],[37] 43,955  
Total Level 3 investments [7],[26],[37] $ 42,083  
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 9,360 [28] 9,360
Investment, cost $ 10,400 [28] $ 10,400
Total Level 3 investments $ 17,580 [28] $ 10,400
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.75% [26] 7.50% [15]
Spread 6.50% [26] 6.50% [15]
Principal $ 7,600 [26] $ 6,400 [15]
Investment, cost 7,537 [26] 6,324 [15]
Total Level 3 investments $ 7,600 [26] $ 6,324 [15]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.25% [26] 12.00% [15]
Spread 9.00% [26] 11.00% [15]
Principal $ 21,200 [26] $ 21,200 [15]
Investment, cost 21,038 [26] 20,996 [15]
Total Level 3 investments $ 21,200 [26] $ 20,996 [15]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15],[48]   9.09%
Spread [8],[15],[48]   8.09%
Principal [8],[15],[48]   $ 5,400
Investment, cost [8],[15],[48]   5,304
Total Level 3 investments [8],[15],[48]   $ 5,287
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.21%  
Spread [7],[25],[26] 7.50%  
Principal [7],[25],[26] $ 736  
Investment, cost [7],[25],[26] 736  
Total Level 3 investments [7],[25],[26] $ 736  
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 12.19%  
Spread [7],[25],[26] 7.50%  
Principal [7],[25],[26] $ 11,095  
Investment, cost [7],[25],[26] 10,852  
Total Level 3 investments [7],[25],[26] $ 11,095  
Investment, Identifier [Axis]: Fortna Acquisition Co., Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8]   5.09%
Spread [8]   5.00%
Principal [8]   $ 7,595
Investment, cost [8]   7,525
Total Level 3 investments [8]   $ 7,595
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport Financial SBIC Fund LP)    
Schedule of Investments [Line Items]    
Units (percentage) 9.30% [9],[10],[40] 9.30% [11],[12],[41]
Investment, cost $ 3,507 [9],[10],[40] $ 5,974 [11],[12],[41]
Total Level 3 investments $ 3,483 [9],[10],[40] $ 6,078 [11],[12],[41]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)    
Schedule of Investments [Line Items]    
Units (percentage) 5.95% [9],[10],[28],[40] 6.00% [11],[12],[29],[41]
Investment, cost $ 6,303 [9],[10],[28],[40] $ 7,629 [11],[12],[29],[41]
Total Level 3 investments $ 5,848 [9],[10],[28],[40] $ 7,231 [11],[12],[29],[41]
Investment, Identifier [Axis]: Fuse, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 10,429 [13] 10,429 [14]
Investment, cost $ 256 [13] $ 256 [14]
Total Level 3 investments $ 0 [13] $ 0 [14]
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% [13] 12.00% [14]
Principal $ 1,810 [13] $ 1,810 [14]
Investment, cost 1,810 [13] 1,810 [14]
Total Level 3 investments $ 1,512 [13] $ 1,672 [14]
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 226 [28] 226 [29]
Investment, cost $ 4,900 [28] $ 4,900 [29]
Total Level 3 investments $ 7,140 [28] $ 6,990 [29]
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.00% 12.00%
Principal $ 11,345 $ 12,545
Investment, cost 11,269 12,435
Total Level 3 investments $ 11,345 $ 12,545
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 5,879 [28] 5,879 [29]
Investment, cost $ 13,065 [28] $ 13,065 [29]
Total Level 3 investments $ 44,440 [28] $ 46,190 [29]
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   8.10%
Spread   8.00%
Principal   $ 38,885
Investment, cost   38,672
Total Level 3 investments   $ 38,885
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.12%  
Spread 6.00%  
Principal $ 670  
Investment, cost 670  
Total Level 3 investments $ 670  
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.12%  
Spread 8.00%  
Principal $ 40,493  
Investment, cost 40,313  
Total Level 3 investments $ 40,493  
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   6.75%
Spread [8],[15]   5.75%
Principal [8],[15]   $ 13,243
Investment, cost [8],[15]   13,167
Total Level 3 investments [8],[15]   $ 13,243
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.20%  
Spread [7],[26] 6.50%  
Principal [7],[26] $ 2,177  
Investment, cost [7],[26] 2,169  
Total Level 3 investments [7],[26] $ 2,171  
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.24%  
Spread [7],[26] 6.50%  
Principal [7],[26] $ 10,734  
Investment, cost [7],[26] 10,695  
Total Level 3 investments [7],[26] $ 10,705  
Investment, Identifier [Axis]: GS Operating, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.00%
Spread [8],[15]   6.50%
Principal [8],[15]   $ 28,451
Investment, cost [8],[15]   28,068
Total Level 3 investments [8],[15]   $ 28,451
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.42%  
Spread [7],[25],[26] 6.00%  
Principal [7],[25],[26] $ 252  
Investment, cost [7],[25],[26] 233  
Total Level 3 investments [7],[25],[26] $ 252  
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 6.00%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (15)  
Total Level 3 investments [7],[25],[26],[27] $ (15)  
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.73%  
Spread [7],[25],[26] 6.00%  
Principal [7],[25],[26] $ 3,661  
Investment, cost [7],[25],[26] 3,591  
Total Level 3 investments [7],[25],[26] $ 3,661  
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 9,042 [28] 9,042 [29]
Investment, cost $ 17,692 [28] $ 17,692 [29]
Total Level 3 investments $ 50,890 [28] $ 49,700 [29]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   9.50%
Spread [15]   7.50%
Principal [15]   $ 21,598
Investment, cost [15]   21,535
Total Level 3 investments [15]   $ 21,598
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [25],[26],[27] 8.50%  
Principal [25],[26],[27] $ 0  
Investment, cost [25],[26],[27] 0  
Total Level 3 investments [25],[26],[27] $ 0  
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [25],[26] 11.50%  
Spread [25],[26] 8.50%  
Principal [25],[26] $ 64,078  
Investment, cost [25],[26] 63,685  
Total Level 3 investments [25],[26] $ 64,078  
Investment, Identifier [Axis]: Garreco, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,200 [28] 1,200 [29]
Investment, cost $ 1,200 [28] $ 1,200 [29]
Total Level 3 investments $ 1,800 [28] $ 2,270 [29]
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.50% [26],[49] 9.00% [15],[50]
Spread 8.00% [26],[49] 8.00% [15],[50]
Principal $ 3,826 [26],[49] $ 4,196 [15],[50]
Investment, cost 3,826 [26],[49] 4,196 [15],[50]
Total Level 3 investments $ 3,826 [26],[49] $ 4,196 [15],[50]
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.44% [13] 5.35% [14]
Spread 5.25% [13] 5.25% [14]
Principal $ 20,497 [13] $ 20,710 [14]
Investment, cost 20,427 [13] 20,615 [14]
Total Level 3 investments $ 19,472 [13] $ 20,606 [14]
Investment, Identifier [Axis]: GoWireless Holdings, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   7.50%
Spread [14],[15]   6.50%
Principal [14],[15]   $ 18,534
Investment, cost [14],[15]   18,440
Total Level 3 investments [14],[15]   $ 18,576
Investment, Identifier [Axis]: Grupo Hima San Pablo, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [14],[15],[30],[33]   9.25%
Spread [14],[15],[30],[33]   7.00%
Principal [14],[15],[30],[33]   $ 4,504
Investment, cost [14],[15],[30],[33]   4,504
Total Level 3 investments [14],[15],[30],[33]   $ 1,269
Investment, Identifier [Axis]: Grupo Hima San Pablo, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [14],[30],[33]   13.75%
Principal [14],[30],[33]   $ 2,055
Investment, cost [14],[30],[33]   2,040
Total Level 3 investments [14],[30],[33]   $ 49
Investment, Identifier [Axis]: Grupo Hima San Pablo, Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [14],[33]   12.00%
Principal [14],[33]   $ 147
Investment, cost [14],[33]   147
Total Level 3 investments [14],[33]   $ 147
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 438 [28] 438 [29]
Investment, cost $ 2,980 [28] $ 2,980 [29]
Total Level 3 investments $ 6,790 [28] $ 5,640 [29]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 3,681 3,681
Investment, cost $ 3,681 $ 3,681
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 63,720  
Investment, cost $ 5,600  
Total Level 3 investments $ 3,780  
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [15],[33]   10.50%
Spread 9.50% [26],[27] 9.50% [15],[33]
PIK Rate [15],[33]   5.25%
Principal $ 0 [26],[27] $ 257 [15],[33]
Investment, cost 0 [26],[27] 257 [15],[33]
Total Level 3 investments $ 0 [26],[27] $ 257 [15],[33]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.50% 12.50% [33]
PIK Rate [33]   6.25%
Principal $ 2,400 $ 13,565 [33]
Investment, cost 2,400 13,565 [33]
Total Level 3 investments $ 2,284 $ 9,717 [33]
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.50%
Spread [8],[15]   7.50%
Principal [8],[15]   $ 3,449
Investment, cost [8],[15]   3,419
Total Level 3 investments [8],[15]   $ 3,059
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 14.34%  
Spread [7],[25],[26] 9.50%  
PIK Rate [7],[25],[26] 2.00%  
Principal [7],[25],[26] $ 320  
Investment, cost [7],[25],[26] 319  
Total Level 3 investments [7],[25],[26] $ 311  
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 14.34%  
Spread [7],[25],[26] 9.50%  
PIK Rate [7],[25],[26] 2.00%  
Principal [7],[25],[26] $ 3,277  
Investment, cost [7],[25],[26] 3,262  
Total Level 3 investments [7],[25],[26] $ 3,186  
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 6.50%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (62)  
Total Level 3 investments [7],[25],[26],[27] $ (62)  
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 6.50%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (62)  
Total Level 3 investments [7],[25],[26],[27] $ (62)  
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.62%  
Spread [7],[25],[26] 6.50%  
Principal [7],[25],[26] $ 16,791  
Investment, cost [7],[25],[26] 16,483  
Total Level 3 investments [7],[25],[26] $ 16,791  
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.69% [10],[13],[16],[26] 7.00% [12],[14],[15],[51]
Spread 6.00% [10],[13],[16],[26] 6.00% [12],[14],[15],[51]
Principal $ 25,290 [10],[13],[16],[26] $ 25,546 [12],[14],[15],[51]
Investment, cost 25,290 [10],[13],[16],[26] 25,546 [12],[14],[15],[51]
Total Level 3 investments $ 24,381 [10],[13],[16],[26] $ 25,546 [12],[14],[15],[51]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 HPP-MS, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [9],[10],[40] 49.26%  
Investment, cost [9],[10],[40] $ 248  
Total Level 3 investments [9],[10],[40] $ 248  
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) 49.26% [9],[10],[40] 49.30% [11],[12]
Investment, cost $ 3,895 [9],[10],[40] $ 2,703 [11],[12]
Total Level 3 investments $ 7,552 [9],[10],[40] $ 3,971 [11],[12]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 COR, LP)    
Schedule of Investments [Line Items]    
Units (percentage) [9],[10],[40] 22.93%  
Investment, cost [9],[10],[40] $ 1,400  
Total Level 3 investments [9],[10],[40] $ 1,400  
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) 8.22% [9],[10],[40] 8.20% [11],[12],[41]
Investment, cost $ 2,558 [9],[10],[40] $ 3,193 [11],[12],[41]
Total Level 3 investments $ 4,331 [9],[10],[40] $ 4,712 [11],[12],[41]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 4, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [9],[10],[40] 8.71%  
Investment, cost [9],[10],[40] $ 2,332  
Total Level 3 investments [9],[10],[40] $ 2,332  
Investment, Identifier [Axis]: Harrison Hydra-Gen, Ltd., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 107,456 107,456
Investment, cost $ 718 $ 718
Total Level 3 investments $ 3,280 $ 3,530
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 226 [28] 226 [12],[29]
Investment, cost $ 2,850 [28] $ 2,850 [12],[29]
Total Level 3 investments $ 17,460 [28] $ 14,680 [12],[29]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 226 [37] 226 [12],[38]
Investment, cost $ 150 [37] $ 150 [12],[38]
Total Level 3 investments $ 920 [37] $ 770 [12],[38]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.13% [26] 7.00% [12],[15]
Spread 6.00% [26] 6.00% [12],[15]
Principal $ 3,185 [26] $ 2,585 [12],[15]
Investment, cost 3,183 [26] 2,585 [12],[15]
Total Level 3 investments $ 3,185 [26] $ 2,585 [12],[15]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 9.00% 8.00% [12]
Principal $ 37,800 $ 34,800 [12]
Investment, cost 37,685 34,672 [12]
Total Level 3 investments $ 37,800 $ 34,800 [12]
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.88%  
Spread [7],[26] 6.50%  
Principal [7],[26] $ 14,663  
Investment, cost [7],[26] 14,430  
Total Level 3 investments [7],[26] $ 13,599  
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt September 09,2020    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.50%
Spread [8],[15]   6.50%
Principal [8],[15]   $ 14,813
Investment, cost [8],[15]   14,477
Total Level 3 investments [8],[15]   $ 14,887
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 322,297 322,297 [29]
Investment, cost $ 2,352 $ 2,352 [29]
Total Level 3 investments $ 2,400 $ 3,210 [29]
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt    
Schedule of Investments [Line Items]    
Total Rate 8.00% 8.00%
Principal $ 3,000 $ 3,000
Investment, cost 3,000 3,000
Total Level 3 investments $ 3,000 $ 2,960
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.07% [7],[25] 9.25% [8],[15]
Spread 8.25% [7],[25] 8.25% [8],[15]
Principal $ 7,088 [7],[25] $ 7,088 [8],[15]
Investment, cost 6,986 [7],[25] 6,957 [8],[15]
Total Level 3 investments $ 6,144 [7],[25] 7,028 [8],[15]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)    
Schedule of Investments [Line Items]    
Units (percentage) [9],[10],[28] 20.00%  
Investment, cost [9],[10],[28] $ 19,000  
Total Level 3 investments [9],[10],[28] $ 11,758  
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest) | Non‑Control/Non‑Affiliate investments    
Schedule of Investments [Line Items]    
Diluted, percentage [9],[10] 20.00%  
Profits, percentage [9],[10] 21.75%  
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 24.40% profits interest)    
Schedule of Investments [Line Items]    
Investment, cost [11],[12],[29]   19,000
Total Level 3 investments [11],[12],[29]   $ 14,387
Diluted, percentage [11],[12]   20.00%
Profits, percentage [11],[12]   24.40%
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   6.75%
Spread [14],[15]   5.75%
Principal [14],[15]   $ 9,591
Investment, cost [14],[15]   9,419
Total Level 3 investments [14],[15]   $ 9,419
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [13],[25],[26],[52] 10.17%  
Spread [13],[25],[26],[52] 5.75%  
Principal [13],[25],[26],[52] $ 698  
Investment, cost [13],[25],[26],[52] 670  
Total Level 3 investments [13],[25],[26],[52] $ 698  
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [13],[25],[26] 10.17%  
Spread [13],[25],[26] 5.75%  
Principal [13],[25],[26] $ 14,499  
Investment, cost [13],[25],[26] 14,304  
Total Level 3 investments [13],[25],[26] $ 14,499  
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.48% [13],[26] 6.50% [14],[15]
Spread 5.75% [13],[26] 5.75% [14],[15]
Principal $ 7,125 [13],[26] $ 7,406 [14],[15]
Investment, cost 6,968 [13],[26] 7,205 [14],[15]
Total Level 3 investments $ 6,092 [13],[26] $ 7,258 [14],[15]
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 13.98% [7],[26] 8.75% [8],[15]
Spread 7.75% [7],[26] 7.75% [8],[15]
PIK Rate [7],[26] 1.50%  
Principal $ 18,515 [7],[26] $ 18,702 [8],[15]
Investment, cost 18,384 [7],[26] 18,471 [8],[15]
Total Level 3 investments $ 17,464 [7],[26] $ 17,743 [8],[15]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,558,333 [7] 1,558,333 [8]
Investment, cost $ 1,558 [7] $ 1,558 [8]
Total Level 3 investments $ 0 [7] $ 0 [8]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 1    
Schedule of Investments [Line Items]    
Total Rate 6.00% [7] 6.00% [8]
PIK Rate 6.00% [7] 6.00% [8]
Investment, cost $ 3,235 [7] $ 3,235 [8]
Total Level 3 investments 0 [7] 4,329 [8]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 2    
Schedule of Investments [Line Items]    
Investment, cost 0 [7] 0 [8]
Total Level 3 investments $ 0 [7] $ 0 [8]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 13.00% [7],[26],[53] 7.20% [8],[54]
Spread [7],[26],[53] 5.50%  
PIK Rate [7],[26],[53] 13.00%  
Principal $ 7,027 [7],[26],[53] $ 6,563 [8],[54]
Investment, cost 7,027 [7],[26],[53] 6,563 [8],[54]
Total Level 3 investments $ 7,027 [7],[26],[53] $ 6,563 [8],[54]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 6.00% [7],[31] 6.00% [8]
PIK Rate 6.00% [7],[31] 6.00% [8]
Principal $ 18,428 [7],[31] $ 17,891 [8]
Investment, cost 17,664 [7],[31] 16,861 [8]
Total Level 3 investments $ 7,633 [7],[31] $ 16,861 [8]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25] 14.42%  
Spread [7],[25] 10.00%  
PIK Rate [7],[25] 14.42%  
Principal [7],[25] $ 806  
Investment, cost [7],[25] 769  
Total Level 3 investments [7],[25] $ 769  
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) [7],[27],[55] 242,914  
Investment, cost [7],[27],[55] $ 0  
Total Level 3 investments [7],[27],[55] $ 0  
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 900 [7],[37] 900 [8],[38]
Investment, cost $ 900 [7],[37] $ 900 [8],[38]
Total Level 3 investments $ 600 [7],[37] $ 730 [8],[38]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 144 [7],[28],[37] 144 [8],[29],[38]
Total Rate 10.00% [7],[28],[37] 10.00% [8],[29],[38]
PIK Rate 10.00% [7],[28],[37] 10.00% [8],[29],[38]
Investment, cost $ 129 [7],[28],[37] $ 120 [8],[29],[38]
Total Level 3 investments $ 145 [7],[28],[37] $ 164 [8],[29],[38]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 80 [7],[28],[37] 80 [8],[29],[38]
Total Rate 20.00% [7],[28],[37] 20.00% [8],[29],[38]
PIK Rate 20.00% [7],[28],[37] 20.00% [8],[29],[38]
Investment, cost $ 92 [7],[28],[37] $ 81 [8],[29],[38]
Total Level 3 investments $ 93 [7],[28],[37] $ 99 [8],[29],[38]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.75%
Spread [8],[15]   6.75%
Principal [8],[15]   $ 19,897
Investment, cost [8],[15]   19,490
Total Level 3 investments [8],[15]   $ 19,490
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.50%  
Spread [7],[26] 6.75%  
Principal [7],[26] $ 463  
Investment, cost [7],[26] 430  
Total Level 3 investments [7],[26] $ 463  
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.50%  
Spread [7],[26] 6.75%  
Principal [7],[26] $ 19,239  
Investment, cost [7],[26] 18,956  
Total Level 3 investments [7],[26] $ 19,239  
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.00%
Spread [8],[15]   6.00%
Principal [8],[15]   $ 8,680
Investment, cost [8],[15]   8,487
Total Level 3 investments [8],[15]   $ 8,487
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 5.50%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (19)  
Total Level 3 investments [7],[26],[27] $ (19)  
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.23%  
Spread [7],[26] 5.50%  
Principal [7],[26] $ 8,593  
Investment, cost [7],[26] 8,461  
Total Level 3 investments [7],[26] $ 8,593  
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [7] 2,143  
Investment, cost [7] $ 0  
Total Level 3 investments [7] $ 0  
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 14.22% [7],[56] 11.75% [8],[15]
Spread 10.00% [7],[56] 10.00% [8],[15]
Principal $ 1,682 [7],[56] $ 525 [8],[15]
Investment, cost 1,682 [7],[56] 525 [8],[15]
Total Level 3 investments $ 1,682 [7],[56] $ 525 [8],[15]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.07% [7],[26],[31] 9.75% [8],[15],[30]
Spread 7.00% [7],[26],[31] 7.00% [8],[15],[30]
PIK Rate 1.00% [7],[26],[31] 1.00% [8],[15],[30]
Principal $ 7,313 [7],[26],[31] $ 7,313 [8],[15],[30]
Investment, cost 7,237 [7],[26],[31] 7,237 [8],[15],[30]
Total Level 3 investments $ 1,082 [7],[26],[31] $ 5,233 [8],[15],[30]
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.38% [13],[26] 7.00% [14],[15]
Spread 6.00% [13],[26] 6.00% [14],[15]
Principal $ 20,467 [13],[26] $ 20,627 [14],[15]
Investment, cost 20,418 [13],[26] 20,559 [14],[15]
Total Level 3 investments $ 15,811 [13],[26] $ 20,527 [14],[15]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.00%
Spread [8],[15]   6.50%
Principal [8],[15]   $ 17,510
Investment, cost [8],[15]   17,354
Total Level 3 investments [8],[15]   $ 17,510
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.14%  
Spread [7],[26] 6.50%  
Principal [7],[26] $ 622  
Investment, cost [7],[26] 618  
Total Level 3 investments [7],[26] $ 622  
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.17%  
Spread [7],[26] 6.50%  
Principal [7],[26] $ 16,889  
Investment, cost [7],[26] 16,784  
Total Level 3 investments [7],[26] $ 16,889  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 179,778 179,778
Investment, cost $ 1,798 $ 1,798
Total Level 3 investments $ 1,798 $ 1,798
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.50% 13.00%
Principal $ 4,534 $ 4,600
Investment, cost 4,500 4,557
Total Level 3 investments $ 4,500 $ 4,557
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.50% 12.50%
Principal $ 3,154 $ 3,200
Investment, cost 3,130 3,170
Total Level 3 investments $ 3,130 $ 3,170
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 12.50% 12.50%
Principal $ 8,944 $ 20,000
Investment, cost 8,944 19,805
Total Level 3 investments $ 8,944 $ 19,805
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4    
Schedule of Investments [Line Items]    
Total Rate 12.50% 12.50%
PIK Rate   12.50%
Principal $ 19,712 $ 8,944
Investment, cost 19,559 8,944
Total Level 3 investments $ 19,559 $ 8,944
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.93% [13],[26],[31] 6.75% [14],[15]
Spread 7.75% [13],[26],[31] 5.75% [14],[15]
Principal $ 5,053 [13],[26],[31] $ 5,158 [14],[15]
Investment, cost 5,038 [13],[26],[31] 5,135 [14],[15]
Total Level 3 investments $ 1,537 [13],[26],[31] $ 3,865 [14],[15]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 1,684,211 [7] 1,684,211 [8]
Investment, cost $ 1,684 [7] $ 1,684 [8]
Total Level 3 investments $ 2,840 [7] $ 1,684 [8]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.00%
Spread [8],[15]   6.00%
Principal [8],[15]   $ 37,895
Investment, cost [8],[15]   36,972
Total Level 3 investments [8],[15]   $ 36,972
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 6.00%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (135)  
Total Level 3 investments [7],[26],[27] $ (135)  
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.73%  
Spread [7],[26] 6.00%  
Principal [7],[26] $ 36,947  
Investment, cost [7],[26] 36,358  
Total Level 3 investments [7],[26] $ 36,947  
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 2,826,667 [7],[28] 2,826,667 [8]
Total Rate [7],[28] 12.00%  
PIK Rate [7],[28] 12.00%  
Investment, cost $ 123 [7],[28] $ 314 [8]
Total Level 3 investments $ 623 [7],[28] $ 314 [8]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.00%
Spread [8],[15]   7.00%
Principal [8],[15]   $ 2,100
Investment, cost [8],[15]   2,100
Total Level 3 investments [8],[15]   $ 2,100
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 12.23%  
Spread [7],[26] 7.50%  
Principal [7],[26] $ 500  
Investment, cost [7],[26] 483  
Total Level 3 investments [7],[26] $ 500  
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 12.23%  
Spread [7],[26] 7.50%  
Principal [7],[26] $ 2,079  
Investment, cost [7],[26] 2,079  
Total Level 3 investments [7],[26] $ 2,079  
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 627 [28] 627 [29]
Investment, cost $ 811 [28] $ 811 [29]
Total Level 3 investments $ 14,970 [28] $ 12,420 [29]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   10.00%
Spread [15]   6.75%
Principal [15]   $ 2,550
Investment, cost [15]   2,536
Total Level 3 investments [15]   $ 2,550
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [27] 6.75%  
Principal [27] $ 0  
Investment, cost [27] 0  
Total Level 3 investments [27] $ 0  
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 13.75%  
Spread [26] 6.75%  
Principal [26] $ 2,450  
Investment, cost [26] 2,444  
Total Level 3 investments [26] $ 2,450  
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 472,579 [13] 472,579 [14]
Investment, cost $ 4,429 [13] $ 4,429 [14]
Total Level 3 investments $ 0 [13] $ 0 [14]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 18.00% [13] 7.00% [14],[15]
Spread [14],[15]   6.00%
Principal $ 2,297 [13] $ 4,034 [14],[15]
Investment, cost 2,297 [13] 3,989 [14],[15]
Total Level 3 investments $ 2,297 [13] $ 3,658 [14],[15]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 19.75% [13],[31] 15.00% [14]
PIK Rate 19.75% [13],[31] 15.00% [14]
Principal $ 4,034 [13],[31] $ 1,000 [14]
Investment, cost 3,997 [13],[31] 1,004 [14]
Total Level 3 investments $ 504 [13],[31] $ 1,004 [14]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 3,150 [28] 3,150
Investment, cost $ 3,150 [28] $ 3,150
Total Level 3 investments $ 5,540 [28] $ 3,150
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   13.00%
Spread [15]   11.50%
Principal [15]   $ 11,475
Investment, cost [15]   11,344
Total Level 3 investments [15]   $ 11,344
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27] 11.50%  
Principal [26],[27] $ 0  
Investment, cost [26],[27] (14)  
Total Level 3 investments [26],[27] $ 0  
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 15.63%  
Spread [26] 11.50%  
Principal [26] $ 9,999  
Investment, cost [26] 9,920  
Total Level 3 investments [26] $ 9,999  
Investment, Identifier [Axis]: JorVet Holdings, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) [28] 107,406  
Investment, cost [28] $ 10,741  
Total Level 3 investments [28] $ 10,741  
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00%  
Principal $ 25,650  
Investment, cost 25,432  
Total Level 3 investments $ 25,432  
Investment, Identifier [Axis]: KBK Industries, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 325 [28] 325 [29]
Investment, cost $ 783 [28] $ 783 [29]
Total Level 3 investments $ 15,570 [28] $ 13,620 [29]
Investment, Identifier [Axis]: KMS, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.25%
Spread [8],[15]   7.25%
Principal [8],[15]   $ 7,581
Investment, cost [8],[15]   7,415
Total Level 3 investments [8],[15]   $ 7,415
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 12.00%  
Spread [7],[26] 7.25%  
Principal [7],[26] $ 1,064  
Investment, cost [7],[26] 1,019  
Total Level 3 investments [7],[26] $ 995  
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 12.00%  
Spread [7],[26] 7.25%  
Principal [7],[26] $ 7,505  
Investment, cost [7],[26] 7,391  
Total Level 3 investments [7],[26] $ 7,022  
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) [28],[37] 800  
Investment, cost [28],[37] $ 992  
Total Level 3 investments [28],[37] $ 2,850  
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares)   581
Investment, cost   $ 12,240
Total Level 3 investments   $ 12,310
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) [29],[38]   800
Investment, cost [29],[38]   $ 992
Total Level 3 investments [29],[38]   $ 2,460
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 581  
Investment, cost $ 12,240  
Total Level 3 investments $ 7,220  
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 11.50% 11.50%
Principal $ 20,415 $ 20,415
Investment, cost 20,374 20,324
Total Level 3 investments $ 20,374 $ 20,324
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 9.00% 9.00%
Principal $ 3,879 $ 3,915
Investment, cost 3,842 3,876
Total Level 3 investments $ 3,842 $ 3,876
Investment, Identifier [Axis]: Klein Hersh, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.75%
Spread [8],[15]   7.00%
Principal [8],[15]   $ 43,321
Investment, cost [8],[15]   42,342
Total Level 3 investments [8],[15]   $ 43,278
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.08% [13],[25] 5.72% [12],[14]
Spread 5.50% [13],[25] 5.50% [12],[14]
Principal $ 11,326 [13],[25] $ 11,415 [12],[14]
Investment, cost 11,280 [13],[25] 11,345 [12],[14]
Total Level 3 investments $ 10,930 [13],[25] $ 11,400 [12],[14]
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) [8]   2,179,001
Investment, cost [8]   $ 2,019
Total Level 3 investments [8]   $ 2,557
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Preferred Member Units (non-voting)    
Schedule of Investments [Line Items]    
Total Rate [8],[29]   14.00%
PIK Rate [8],[29]   14.00%
Investment, cost [8],[29]   $ 107
Total Level 3 investments [8],[29]   $ 107
Investment, Identifier [Axis]: LKCM Headwater Investments I, L.P., LP Interests    
Schedule of Investments [Line Items]    
Units (percentage) 2.27% [9],[10],[28],[40] 2.30% [11],[12],[29],[41]
Investment, cost $ 1,746 [9],[10],[28],[40] $ 1,746 [11],[12],[29],[41]
Total Level 3 investments $ 3,197 [9],[10],[28],[40] $ 2,541 [11],[12],[29],[41]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.25%
Spread [8],[15]   7.25%
Principal [8],[15]   $ 17,438
Investment, cost [8],[15]   17,309
Total Level 3 investments [8],[15]   $ 17,438
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.21%  
Spread [7],[25],[26] 7.25%  
Principal [7],[25],[26] $ 8,106  
Investment, cost [7],[25],[26] 8,087  
Total Level 3 investments [7],[25],[26] $ 8,047  
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.67%  
Spread [7],[25],[26] 7.25%  
Principal [7],[25],[26] $ 9,197  
Investment, cost [7],[25],[26] 9,160  
Total Level 3 investments [7],[25],[26] $ 9,130  
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.67%  
Spread [7],[25],[26] 7.25%  
Principal [7],[25],[26] $ 10,827  
Investment, cost [7],[25],[26] 10,733  
Total Level 3 investments [7],[25],[26] $ 10,749  
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.74% [7],[26] 10.00% [8],[15]
Spread 9.00% [7],[26] 9.00% [8],[15]
Principal $ 4,444 [7],[26] $ 4,478 [8],[15]
Investment, cost 4,370 [7],[26] 4,382 [8],[15]
Total Level 3 investments $ 4,350 [7],[26] $ 4,382 [8],[15]
Investment, Identifier [Axis]: Laredo Energy, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) [8]   1,155,952
Investment, cost [8]   $ 11,560
Total Level 3 investments [8]   $ 9,659
Investment, Identifier [Axis]: LaserAway Intermediate Holdings II, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   6.50%
Spread [14],[15]   5.75%
Principal [14],[15]   $ 4,130
Investment, cost [14],[15]   4,050
Total Level 3 investments [14],[15]   $ 4,115
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.73% [13] 5.22% [14]
Spread 5.00% [13] 5.00% [14]
Principal $ 14,475 [13] $ 14,625 [14]
Investment, cost 14,349 [13] 14,460 [14]
Total Level 3 investments $ 13,968 [13] $ 14,442 [14]
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.13% [7],[26] 6.75% [8],[15]
Spread 5.75% [7],[26] 5.75% [8],[15]
Principal $ 19,662 [7],[26] $ 25,850 [8],[15]
Investment, cost 19,033 [7],[26] 24,605 [8],[15]
Total Level 3 investments $ 16,221 [7],[26] $ 24,428 [8],[15]
Investment, Identifier [Axis]: Looking Glass Investments, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 3 [9],[10] 3 [11],[12]
Investment, cost $ 125 [9],[10] $ 125 [11],[12]
Total Level 3 investments $ 25 [9],[10] $ 25 [11],[12]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   7.00%
Spread [14],[15]   6.00%
Principal [14],[15]   $ 11,682
Investment, cost [14],[15]   11,531
Total Level 3 investments [14],[15]   $ 11,682
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [13],[25],[26] 10.42%  
Spread [13],[25],[26] 6.00%  
Principal [13],[25],[26] $ 8,338  
Investment, cost [13],[25],[26] 8,267  
Total Level 3 investments [13],[25],[26] $ 8,338  
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [13],[25],[26] 10.42%  
Spread [13],[25],[26] 6.00%  
Principal [13],[25],[26] $ 7,876  
Investment, cost [13],[25],[26] 7,784  
Total Level 3 investments [13],[25],[26] $ 7,876  
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 66,000 66,000
Investment, cost $ 4,400 $ 4,400
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 4,000 4,000
Investment, cost $ 6,000 $ 6,000
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 13.00% 13.00%
Principal $ 6,156 $ 8,250
Investment, cost 6,156 8,241
Total Level 3 investments $ 4,548 $ 5,934
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, LP Interests    
Schedule of Investments [Line Items]    
Units (percentage) 14.51% [9],[10],[28],[40] 12.10% [11],[12],[41]
Investment, cost $ 14,250 [9],[10],[28],[40] $ 2,500 [11],[12],[41]
Total Level 3 investments 14,833 [9],[10],[28],[40] $ 2,581 [11],[12],[41]
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Secured Debt    
Schedule of Investments [Line Items]    
Principal [9],[10],[27] 0  
Investment, cost [9],[10],[27] 0  
Total Level 3 investments [9],[10],[27] $ 0  
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Unsecured Debt    
Schedule of Investments [Line Items]    
Total Rate [11],[12]   5.00%
Principal [11],[12]   $ 63,151
Investment, cost [11],[12]   63,151
Total Level 3 investments [11],[12]   63,151
Investment, Identifier [Axis]: MSC Adviser I, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) [28],[57] 1  
Investment, cost $ 29,500 [28],[57] 29,500 [29],[58]
Total Level 3 investments $ 122,930 [28],[57] $ 140,400 [29],[58]
Investment, Identifier [Axis]: MSC Income Fund, Inc., Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) [9],[10],[28] 94,697  
Investment, cost [9],[10],[28] $ 750  
Total Level 3 investments [9],[10],[28] $ 753  
Investment, Identifier [Axis]: Mac Lean-Fogg Company, Preferred Stock    
Schedule of Investments [Line Items]    
Total Rate [8]   13.75%
PIK Rate [8]   9.25%
Investment, cost [8]   $ 1,920
Total Level 3 investments [8]   $ 1,920
Investment, Identifier [Axis]: Mac Lean-Fogg Company, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   5.88%
Spread [8],[15]   5.25%
Principal [8],[15]   $ 17,080
Investment, cost [8],[15]   16,995
Total Level 3 investments [8],[15]   $ 17,080
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.00%
Spread [8],[15]   7.25%
Principal [8],[15]   $ 17,589
Investment, cost [8],[15]   17,267
Total Level 3 investments [8],[15]   $ 17,589
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26],[59] 11.79%  
Spread [7],[26],[59] 7.25%  
Principal [7],[26],[59] $ 3,103  
Investment, cost [7],[26],[59] 3,063  
Total Level 3 investments [7],[26],[59] $ 3,083  
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.09%  
Spread [7],[26] 7.25%  
Principal [7],[26] $ 15,324  
Investment, cost [7],[26] 15,122  
Total Level 3 investments [7],[26] $ 15,224  
Investment, Identifier [Axis]: Market Force Information, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 743,921 743,921
Investment, cost $ 16,642 $ 16,642
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 15.13% [26] 12.00% [15]
Spread 11.00% [26] 11.00% [15]
Principal $ 6,275 [26] $ 3,400 [15]
Investment, cost 6,253 [26] 3,400 [15]
Total Level 3 investments $ 6,090 [26] $ 3,400 [15]
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00% [31] 12.00% [33]
PIK Rate 12.00% [31] 12.00% [33]
Principal $ 26,079 [31] $ 26,079 [33]
Investment, cost 25,952 [31] 25,952 [33]
Total Level 3 investments $ 1,610 [31] $ 8,936 [33]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 1,537,219  
Investment, cost $ 1,537  
Total Level 3 investments $ 1,537  
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) [28] 5,915,585  
Total Rate [28] 8.00%  
PIK Rate [28] 8.00%  
Investment, cost [28] $ 6,010  
Total Level 3 investments [28] 6,010  
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] 0  
Total Level 3 investments [27] $ 0  
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.75%  
Principal $ 23,802  
Investment, cost 23,576  
Total Level 3 investments $ 23,576  
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 6.25%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (63)  
Total Level 3 investments [7],[25],[26],[27] $ (63)  
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 9.86%  
Spread [7],[25],[26] 6.25%  
Principal [7],[25],[26] $ 26,075  
Investment, cost [7],[25],[26] 25,619  
Total Level 3 investments [7],[25],[26] $ 25,181  
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.66% [7],[26] 7.25% [8],[15]
Spread 6.25% [7],[26] 6.25% [8],[15]
Principal $ 18,769 [7],[26] $ 17,781 [8],[15]
Investment, cost 18,562 [7],[26] 17,563 [8],[15]
Total Level 3 investments $ 18,338 [7],[26] $ 17,781 [8],[15]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [7],[10],[16] 44,445,814  
Investment, cost [7],[10],[16] $ 889  
Total Level 3 investments [7],[10],[16] $ 889  
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [7],[10],[16],[26] 11.73%  
Spread [7],[10],[16],[26] 7.00%  
Principal [7],[10],[16],[26] $ 17,038  
Investment, cost [7],[10],[16],[26] 16,746  
Total Level 3 investments [7],[10],[16],[26] $ 17,038  
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[10],[16],[26],[27] 7.00%  
Principal [7],[10],[16],[26],[27] $ 0  
Investment, cost [7],[10],[16],[26],[27] (64)  
Total Level 3 investments [7],[10],[16],[26],[27] $ (64)  
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[10],[16],[26] 11.73%  
Spread [7],[10],[16],[26] 7.00%  
Principal [7],[10],[16],[26] $ 10,107  
Investment, cost [7],[10],[16],[26] 9,923  
Total Level 3 investments [7],[10],[16],[26] $ 10,714  
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 5,873 [28] 5,873 [29]
Investment, cost $ 2,720 [28] $ 2,720 [29]
Total Level 3 investments 22,830 [28] $ 8,840 [29]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   12.00%
Principal   $ 6,378
Investment, cost   6,377
Total Level 3 investments   $ 6,378
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] 0  
Total Level 3 investments [27] $ 0  
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.00%  
Principal $ 5,746  
Investment, cost 5,746  
Total Level 3 investments $ 5,746  
Investment, Identifier [Axis]: NAPCO Precast, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 2,955 2,955 [29]
Investment, cost $ 2,975 $ 2,975 [29]
Total Level 3 investments $ 11,830 $ 13,560 [29]
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.67% [13],[26] 6.50% [15]
Spread 5.50% [13],[26] 5.50% [15]
Principal $ 3,849 [13],[26] $ 3,987 [15]
Investment, cost 3,834 [13],[26] 3,961 [15]
Total Level 3 investments $ 1,251 [13],[26] $ 2,758 [15]
Investment, Identifier [Axis]: NGL Transportation & Storage, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [13],[26] 10.70%  
Spread [13],[26] 6.00%  
Principal [13],[26] $ 6,823  
Investment, cost [13],[26] 6,764  
Total Level 3 investments [13],[26] $ 6,141  
Investment, Identifier [Axis]: NNE Partners, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8]   9.37%
Spread [8]   4.75%
PIK Rate [8]   4.50%
Principal [8]   $ 24,781
Investment, cost [8]   24,709
Total Level 3 investments [8]   $ 23,154
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 65,962 [28] 65,962 [29]
Investment, cost $ 3,717 [28] $ 3,717 [29]
Total Level 3 investments $ 4,790 [28] $ 6,440 [29]
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 2,080 $ 2,080
Investment, cost 2,080 2,080
Total Level 3 investments $ 2,080 $ 2,080
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.50% [13],[26] 8.25% [14],[15]
Spread 6.25% [13],[26] 6.25% [14],[15]
PIK Rate 1.00% [13],[26] 1.00% [14],[15]
Principal $ 4,358 [13],[26] $ 4,598 [14],[15]
Investment, cost 4,358 [13],[26] 4,598 [14],[15]
Total Level 3 investments $ 4,228 [13],[26] $ 4,552 [14],[15]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.50%
Spread [8],[15]   6.50%
Principal [8],[15]   $ 42,972
Investment, cost [8],[15]   42,108
Total Level 3 investments [8],[15]   $ 42,323
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26],[60] 10.85%  
Spread [7],[25],[26],[60] 8.00%  
Principal [7],[25],[26],[60] $ 3,941  
Investment, cost [7],[25],[26],[60] 3,797  
Total Level 3 investments [7],[25],[26],[60] $ 3,720  
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 12.56%  
Spread [7],[25],[26] 8.00%  
Principal [7],[25],[26] $ 39,851  
Investment, cost [7],[25],[26] 39,094  
Total Level 3 investments [7],[25],[26] $ 37,616  
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7] 20.00%  
PIK Rate [7] 20.00%  
Principal [7] $ 6,509  
Investment, cost [7] 6,194  
Total Level 3 investments [7] $ 6,194  
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 6,987 6,987
Investment, cost $ 6,987 $ 6,987
Total Level 3 investments $ 7,700 $ 7,700
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate   12.00%
Spread [26],[27] 7.00%  
Principal $ 0 [26],[27] $ 10,500
Investment, cost 0 [26],[27] 10,412
Total Level 3 investments $ 0 [26],[27] $ 10,412
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 20,094 $ 4,868
Investment, cost 19,972 4,829
Total Level 3 investments $ 20,094 $ 4,829
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 12.00%  
Principal $ 10,500  
Investment, cost 10,434  
Total Level 3 investments $ 10,500  
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 103,144,186 [28] 86,400,000 [29]
Investment, cost $ 8,213 [28] $ 6,880 [29]
Total Level 3 investments 1,110 [28] $ 2,690 [29]
Investment, Identifier [Axis]: NexRev LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   11.00%
Principal   $ 16,217
Investment, cost   16,173
Total Level 3 investments   $ 14,045
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] 0  
Total Level 3 investments [27] $ 0  
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.00%  
Principal $ 11,465  
Investment, cost 11,335  
Total Level 3 investments $ 8,477  
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.25%
Spread [8],[15]   6.25%
Principal [8],[15]   $ 31,425
Investment, cost [8],[15]   30,837
Total Level 3 investments [8],[15]   $ 31,368
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 6.25%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (1)  
Total Level 3 investments [7],[26],[27] $ 0  
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 6.25%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (38)  
Total Level 3 investments [7],[26],[27] $ (38)  
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 9.99%  
Spread [7],[26] 6.25%  
Principal [7],[26] $ 21,666  
Investment, cost [7],[26] 21,418  
Total Level 3 investments [7],[26] $ 21,666  
Investment, Identifier [Axis]: Northstar Group Services, Inc, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   6.50%
Spread [14],[15]   5.50%
Principal [14],[15]   $ 10,000
Investment, cost [14],[15]   9,952
Total Level 3 investments [14],[15]   $ 10,034
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares)   406
Investment, cost   $ 10,200
Total Level 3 investments   $ 13,500
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 406  
Investment, cost $ 10,200  
Total Level 3 investments $ 8,040  
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 2,062  
Investment, cost $ 2,062  
Total Level 3 investments $ 5,150  
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.63% [26] 7.50% [15]
Spread 6.50% [26] 6.50% [15]
Principal $ 4,400 [26] $ 1,720 [15]
Investment, cost 4,399 [26] 1,720 [15]
Total Level 3 investments $ 4,399 [26] $ 1,720 [15]
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00% 11.00%
Principal $ 18,440 $ 17,240
Investment, cost 18,414 17,236
Total Level 3 investments $ 18,414 $ 17,240
Investment, Identifier [Axis]: OMi Topco, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 900 [28] 900 [29]
Investment, cost $ 1,080 [28] $ 1,080 [29]
Total Level 3 investments $ 22,810 [28] $ 20,210 [29]
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 15,750 $ 18,000
Investment, cost 15,634 17,831
Total Level 3 investments $ 15,750 $ 18,000
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.64% [7],[26] 7.25% [8],[15]
Spread 6.25% [7],[26] 6.25% [8],[15]
Principal $ 13,930 [7],[26] $ 14,000 [8],[15]
Investment, cost 13,813 [7],[26] 13,861 [8],[15]
Total Level 3 investments $ 13,094 [7],[26] $ 13,861 [8],[15]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 635 635
Investment, cost $ 830 $ 830
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 912 912
Total Rate 7.00% 7.00%
PIK Rate 7.00% 7.00%
Investment, cost $ 1,981 $ 1,981
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.00% [31] 12.00%
PIK Rate 12.00% [31] 12.00%
Principal $ 964 [31] $ 935
Investment, cost 964 [31] 935
Total Level 3 investments $ 569 [31] $ 935
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00% [31] 12.00%
PIK Rate 12.00% [31] 12.00%
Principal $ 983 [31] $ 954
Investment, cost 983 [31] 954
Total Level 3 investments $ 580 [31] $ 954
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 12.00% [31] 12.00%
PIK Rate 12.00% [31] 12.00%
Principal $ 2,116 [31] $ 2,055
Investment, cost 2,116 [31] 2,055
Total Level 3 investments $ 1,249 [31] $ 2,055
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4    
Schedule of Investments [Line Items]    
Total Rate 12.00% [31] 12.00%
PIK Rate 12.00% [31] 12.00%
Principal $ 4,415 [31] $ 4,286
Investment, cost 4,415 [31] 4,286
Total Level 3 investments $ 2,606 [31] $ 4,286
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.00% [31] 10.00%
PIK Rate 10.00% [31] 10.00%
Principal $ 305 [31] $ 192
Investment, cost 305 [31] 192
Total Level 3 investments $ 305 [31] $ 192
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 4,699 [23] 4,699 [24]
Investment, cost $ 1,089 [23] $ 1,089 [24]
Total Level 3 investments $ 0 [23] $ 0 [24]
Investment, Identifier [Axis]: Oneliance, LLC, Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 1,056 1,056
Investment, cost $ 1,056 $ 1,056
Total Level 3 investments $ 1,056 $ 1,056
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   12.00%
Spread [15]   11.00%
Principal [15]   $ 5,600
Investment, cost [15]   5,547
Total Level 3 investments [15]   $ 5,547
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27] 11.00%  
Principal [26],[27] $ 0  
Investment, cost [26],[27] 0  
Total Level 3 investments [26],[27] $ 0  
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 15.13%  
Spread [26] 11.00%  
Principal [26] $ 5,600  
Investment, cost [26] 5,559  
Total Level 3 investments [26] $ 5,559  
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 10,000 [28],[37] 10,000 [29],[38]
Investment, cost $ 10,000 [28],[37] $ 10,000 [29],[38]
Total Level 3 investments $ 11,750 [28],[37] $ 10,000 [29],[38]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   12.00%
Spread [15]   11.00%
Principal [15]   $ 24,375
Investment, cost [15]   24,151
Total Level 3 investments [15]   $ 24,151
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [26],[27] 11.00%  
Principal [26],[27] $ 0  
Investment, cost [26],[27] 0  
Total Level 3 investments [26],[27] $ 0  
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 15.13%  
Spread [26] 11.00%  
Principal [26] $ 23,600  
Investment, cost [26] 23,429  
Total Level 3 investments [26] $ 23,429  
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 11.50% [7],[31] 11.50% [8],[30]
Principal $ 4,489 [7],[31] $ 4,562 [8],[30]
Investment, cost 4,489 [7],[31] 4,562 [8],[30]
Total Level 3 investments $ 103 [7],[31] $ 112 [8],[30]
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [29]   2,000
Investment, cost [29]   $ 2,150
Total Level 3 investments [29]   $ 14,360
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 1    
Schedule of Investments [Line Items]    
Units (in shares) [28] 2,000  
Investment, cost [28] $ 2,150  
Total Level 3 investments [28] $ 18,950  
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 2    
Schedule of Investments [Line Items]    
Units (in shares) 238,421  
Investment, cost $ 238  
Total Level 3 investments $ 238  
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [15]   7.50%
Spread 7.00% [26],[27] 7.00% [15]
Principal $ 0 [26],[27] $ 750 [15]
Investment, cost (9) [26],[27] 726 [15]
Total Level 3 investments $ 0 [26],[27] $ 726 [15]
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.25% [26] 7.50% [15]
Spread 7.00% [26] 7.00% [15]
Principal $ 21,655 [26] $ 11,655 [15]
Investment, cost 21,408 [26] 11,655 [15]
Total Level 3 investments $ 21,655 [26] $ 11,655 [15]
Investment, Identifier [Axis]: PT Network, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [8]   2
Investment, cost [8]   $ 0
Total Level 3 investments [8]   $ 80
Investment, Identifier [Axis]: PT Network, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.50%
Spread [8],[15]   5.50%
PIK Rate [8],[15]   2.00%
Principal [8],[15]   $ 8,889
Investment, cost [8],[15]   8,889
Total Level 3 investments [8],[15]   $ 8,889
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[10],[25],[26],[27] 7.25%  
Principal [7],[10],[25],[26],[27] $ 0  
Investment, cost [7],[10],[25],[26],[27] (174)  
Total Level 3 investments [7],[10],[25],[26],[27] $ (174)  
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[10],[25],[26] 11.80%  
Spread [7],[10],[25],[26] 7.25%  
Principal [7],[10],[25],[26] $ 28,265  
Investment, cost [7],[10],[25],[26] 27,749  
Total Level 3 investments [7],[10],[25],[26] $ 27,911  
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.26%  
Spread [7],[25],[26] 5.75%  
Principal [7],[25],[26] $ 541  
Investment, cost [7],[25],[26] 437  
Total Level 3 investments [7],[25],[26] $ 530  
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26],[61] 9.96%  
Spread [7],[25],[26],[61] 5.75%  
Principal [7],[25],[26],[61] $ 2,701  
Investment, cost [7],[25],[26],[61] 2,609  
Total Level 3 investments [7],[25],[26],[61] $ 2,649  
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 9.81%  
Spread [7],[25],[26] 5.75%  
Principal [7],[25],[26] $ 18,293  
Investment, cost [7],[25],[26] 17,852  
Total Level 3 investments [7],[25],[26] $ 17,939  
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) [29]   13,800
Investment, cost [29]   $ 13,000
Total Level 3 investments [29]   $ 26,970
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) [28] 13,800  
Investment, cost [28] $ 13,000  
Total Level 3 investments [28] 43,260  
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   12.00%
Principal   $ 32,674
Investment, cost   32,438
Total Level 3 investments   $ 32,674
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] 0  
Total Level 3 investments [27] 0  
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] 0  
Total Level 3 investments [27] $ 0  
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 12.00%  
Principal $ 28,681  
Investment, cost 28,537  
Total Level 3 investments $ 28,681  
Investment, Identifier [Axis]: Principle Environmental, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 1,037 1,037
Investment, cost $ 1,200 $ 1,200
Total Level 3 investments $ 590 $ 710
Investment, Identifier [Axis]: Principle Environmental, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 21,806 [28] 21,806
Investment, cost $ 5,709 [28] $ 5,709
Total Level 3 investments 12,420 [28] $ 11,160
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate   13.00%
Principal 0 [27] $ 1,473
Investment, cost 0 [27] 1,465
Total Level 3 investments $ 0 [27] $ 1,465
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.00% 13.00%
Principal $ 5,897 $ 5,924
Investment, cost 5,806 5,808
Total Level 3 investments $ 5,806 $ 5,808
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.75%
Spread [8],[15]   6.75%
Principal [8],[15]   $ 29,738
Investment, cost [8],[15]   29,151
Total Level 3 investments [8],[15]   $ 29,714
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 6.25%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (18)  
Total Level 3 investments [7],[26],[27] $ (18)  
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.64%  
Spread [7],[26] 6.25%  
Principal [7],[26] $ 29,475  
Investment, cost [7],[26] 29,040  
Total Level 3 investments [7],[26] $ 29,419  
Investment, Identifier [Axis]: Quality Lease Service, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,000 1,000
Investment, cost $ 7,513 $ 9,213
Total Level 3 investments $ 525 $ 2,149
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.75%
Spread [8],[15]   6.75%
Principal [8],[15]   $ 19,374
Investment, cost [8],[15]   19,193
Total Level 3 investments [8],[15]   $ 18,352
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 6.75%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (11)  
Total Level 3 investments [7],[25],[26],[27] $ (11)  
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.56%  
Spread [7],[25],[26] 6.75%  
Principal [7],[25],[26] $ 13,369  
Investment, cost [7],[25],[26] 13,241  
Total Level 3 investments [7],[25],[26] $ 12,094  
Investment, Identifier [Axis]: RM Bidder, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 2,779 [7] 2,779 [8]
Investment, cost $ 46 [7] $ 46 [8]
Total Level 3 investments $ 19 [7] $ 26 [8]
Investment, Identifier [Axis]: RM Bidder, LLC, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 327,532 [7],[62] 187,161 [8],[63]
Investment, cost $ 425 [7],[62] $ 425 [8],[63]
Total Level 3 investments $ 0 [7],[62] $ 0 [8],[63]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   9.00%
Spread [8],[15]   7.75%
Principal [8],[15]   $ 18,191
Investment, cost [8],[15]   17,997
Total Level 3 investments [8],[15]   $ 18,191
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26],[64] 12.02%  
Spread [7],[25],[26],[64] 7.75%  
Principal [7],[25],[26],[64] $ 1,361  
Investment, cost [7],[25],[26],[64] 1,343  
Total Level 3 investments [7],[25],[26],[64] $ 1,258  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.49%  
Spread [7],[25],[26] 7.75%  
Principal [7],[25],[26] $ 16,623  
Investment, cost [7],[25],[26] 16,506  
Total Level 3 investments [7],[25],[26] $ 15,367  
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 8.84% [13],[26] 6.50% [14],[15]
Spread 5.50% [13],[26] 5.50% [14],[15]
Principal $ 19,966 [13],[26] $ 20,124 [14],[15]
Investment, cost 19,745 [13],[26] 19,789 [14],[15]
Total Level 3 investments $ 15,116 [13],[26] $ 19,899 [14],[15]
Investment, Identifier [Axis]: River Aggregates, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,500 1,500 [29],[38]
Investment, cost $ 369 $ 369 [29],[38]
Total Level 3 investments $ 3,620 $ 3,280 [29],[38]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 11,070 11,070
Investment, cost $ 11,070 $ 11,070
Total Level 3 investments 14,880 $ 11,070
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [15]   12.00%
Spread [15]   11.00%
Principal [15]   $ 36,360
Investment, cost [15]   35,956
Total Level 3 investments [15]   $ 35,956
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Principal [26],[27] 0  
Investment, cost [26],[27] (35)  
Total Level 3 investments [26],[27] $ (35)  
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [26] 12.50%  
Principal [26] $ 35,685  
Investment, cost [26] 35,404  
Total Level 3 investments [26] $ 35,404  
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 250 250
Investment, cost $ 2,500 $ 2,500
Total Level 3 investments $ 0 $ 0
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% [31],[36],[65] 12.00% [30],[33],[66]
Principal $ 30,369 [31],[36],[65] $ 30,369 [30],[33],[66]
Investment, cost 29,865 [31],[36],[65] 29,865 [30],[33],[66]
Total Level 3 investments $ 0 [31],[36],[65] $ 0 [30],[33],[66]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.00%
Spread [8],[15]   6.00%
Principal [8],[15]   $ 2,800
Investment, cost [8],[15]   2,704
Total Level 3 investments [8],[15]   $ 2,704
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.97%  
Spread [7],[25],[26] 6.50%  
Principal [7],[25],[26] $ 311  
Investment, cost [7],[25],[26] 300  
Total Level 3 investments [7],[25],[26] $ 311  
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.32%  
Spread [7],[25],[26] 6.50%  
Principal [7],[25],[26] $ 2,333  
Investment, cost [7],[25],[26] 2,291  
Total Level 3 investments [7],[25],[26] $ 2,333  
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 10.32%  
Spread [7],[25],[26] 6.50%  
Principal [7],[25],[26] $ 3,173  
Investment, cost [7],[25],[26] 3,125  
Total Level 3 investments [7],[25],[26] $ 3,173  
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.25%
Spread [8],[15]   6.25%
Principal [8],[15]   $ 11,145
Investment, cost [8],[15]   10,902
Total Level 3 investments [8],[15]   $ 10,902
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 13.02%  
Spread [7],[25],[26] 6.25%  
PIK Rate [7],[25],[26] 2.00%  
Principal [7],[25],[26] $ 5,625  
Investment, cost [7],[25],[26] 5,590  
Total Level 3 investments [7],[25],[26] $ 5,037  
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 13.02%  
Spread [7],[25],[26] 6.25%  
PIK Rate [7],[25],[26] 2.00%  
Principal [7],[25],[26] $ 8,340  
Investment, cost [7],[25],[26] 8,223  
Total Level 3 investments [7],[25],[26] $ 7,478  
Investment, Identifier [Axis]: SI East, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 157 [28] 157 [29]
Investment, cost $ 1,218 [28] $ 1,218 [29]
Total Level 3 investments 13,650 [28] $ 11,570 [29]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   10.25%
Principal   $ 65,850
Investment, cost   65,738
Total Level 3 investments   $ 65,850
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] 0  
Total Level 3 investments [27] $ 0  
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 9.50%  
Principal $ 89,786  
Investment, cost 89,708  
Total Level 3 investments $ 89,786  
Investment, Identifier [Axis]: SIB Holdings, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 95,238 [7] 95,238 [8]
Investment, cost $ 200 [7] $ 200 [8]
Total Level 3 investments $ 146 [7] $ 200 [8]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.00%
Spread [8],[15]   6.00%
Principal [8],[15]   $ 6,282
Investment, cost [8],[15]   6,134
Total Level 3 investments [8],[15]   $ 6,145
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.01%  
Spread [7],[26] 6.25%  
Principal [7],[26] $ 417  
Investment, cost [7],[26] 408  
Total Level 3 investments [7],[26] $ 393  
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.01%  
Spread [7],[26] 6.25%  
Principal [7],[26] $ 1,553  
Investment, cost [7],[26] 1,527  
Total Level 3 investments [7],[26] $ 1,433  
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.01%  
Spread [7],[26] 6.25%  
Principal [7],[26] $ 7,750  
Investment, cost [7],[26] 7,626  
Total Level 3 investments [7],[26] $ 7,151  
Investment, Identifier [Axis]: SPAU Holdings, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [7] 638,710  
Investment, cost [7] $ 639  
Total Level 3 investments [7] $ 639  
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 7.50%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (57)  
Total Level 3 investments [7],[25],[26],[27] $ (57)  
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 11.06%  
Spread [7],[26] 7.50%  
Principal [7],[26] $ 15,928  
Investment, cost [7],[26] 15,641  
Total Level 3 investments [7],[26] $ 15,928  
Investment, Identifier [Axis]: Salient Partners L.P., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   7.00%
Spread [14],[15]   6.00%
Principal [14],[15]   $ 6,251
Investment, cost [14],[15]   6,247
Total Level 3 investments [14],[15]   $ 4,063
Investment, Identifier [Axis]: Salient Partners L.P., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   6.00%
Spread [14],[15]   5.00%
Principal [14],[15]   $ 1,250
Investment, cost [14],[15]   1,250
Total Level 3 investments [14],[15]   $ 2,435
Investment, Identifier [Axis]: Savers, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.34% [13],[25],[26] 6.25% [14],[15]
Spread 5.50% [13],[25],[26] 5.50% [14],[15]
Principal $ 11,286 [13],[25],[26] $ 11,400 [14],[15]
Investment, cost 11,199 [13],[25],[26] 11,295 [14],[15]
Total Level 3 investments $ 10,938 [13],[25],[26] $ 11,386 [14],[15]
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 70,000 [28] 70,000
Investment, cost $ 456 [28] $ 700
Total Level 3 investments $ 1,530 [28] $ 1,510
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 14.00% 13.00%
Principal $ 13,840 $ 5,320
Investment, cost 13,698 5,248
Total Level 3 investments $ 13,840 $ 5,320
Investment, Identifier [Axis]: Slick Innovations, LLC, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) [24]   18,084
Investment, cost [24]   $ 181
Total Level 3 investments [24]   $ 400
Investment, Identifier [Axis]: Sonic Systems International, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 9,968 [7] 7,866 [8]
Investment, cost $ 1,356 [7] $ 1,070 [8]
Total Level 3 investments $ 1,280 [7] $ 1,070 [8]
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 11.24% [7],[26] 8.50% [8],[15]
Spread 7.50% [7],[26] 7.50% [8],[15]
Principal $ 15,769 [7],[26] $ 11,982 [8],[15]
Investment, cost 15,527 [7],[26] 11,757 [8],[15]
Total Level 3 investments $ 15,769 [7],[26] $ 11,757 [8],[15]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 863,636 [7] 863,636 [8]
Investment, cost $ 864 [7] $ 864 [8]
Total Level 3 investments $ 1,316 [7] $ 864 [8]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.25%
Spread [8],[15]   6.25%
Principal [8],[15]   $ 50,704
Investment, cost [8],[15]   49,589
Total Level 3 investments [8],[15]   $ 49,589
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 5.75%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (71)  
Total Level 3 investments [7],[26],[27] $ (71)  
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 9.69%  
Spread [7],[26] 5.75%  
Principal [7],[26] $ 41,255  
Investment, cost [7],[26] 40,603  
Total Level 3 investments [7],[26] $ 41,255  
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 11.83% [7],[10],[16],[26],[67] 8.00% [8],[12],[15],[51],[68]
Spread 7.00% [7],[10],[16],[26],[67] 7.00% [8],[12],[15],[51],[68]
Principal $ 13,740 [7],[10],[16],[26],[67] $ 16,116 [8],[12],[15],[51],[68]
Investment, cost 13,698 [7],[10],[16],[26],[67] 16,039 [8],[12],[15],[51],[68]
Total Level 3 investments $ 12,481 [7],[10],[16],[26],[67] $ 15,620 [8],[12],[15],[51],[68]
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.05% [13],[25],[26] 6.25% [14],[15]
Spread 5.50% [13],[25],[26] 5.50% [14],[15]
Principal $ 7,623 [13],[25],[26] $ 7,700 [14],[15]
Investment, cost 7,559 [13],[25],[26] 7,625 [14],[15]
Total Level 3 investments $ 7,166 [13],[25],[26] $ 7,700 [14],[15]
Investment, Identifier [Axis]: Student Resource Center, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) [7] 5,907,649  
Investment, cost [7] $ 0  
Total Level 3 investments [7] $ 0  
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 13.27% [7] 9.00% [8],[15]
Spread 8.50% [7] 8.00% [8],[15]
Principal $ 5,000 [7] $ 10,969 [8],[15]
Investment, cost 4,556 [7] 10,753 [8],[15]
Total Level 3 investments $ 4,556 [7] $ 10,826 [8],[15]
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,571 1,571
Investment, cost $ 4,500 $ 4,500
Total Level 3 investments $ 4,500 $ 4,500
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 21,500 $ 21,500
Investment, cost 21,378 21,332
Total Level 3 investments $ 21,378 $ 21,332
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 7.88% [26],[69],[70] 4.25% [15],[71]
Spread 3.50% [26],[69],[70] 3.50% [15],[71]
Principal $ 1,974 [26],[69],[70] $ 1,995 [15],[71]
Investment, cost 1,974 [26],[69],[70] 1,995 [15],[71]
Total Level 3 investments $ 1,904 [26],[69],[70] $ 1,994 [15],[71]
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.93% [13],[26] 6.00% [14],[15]
Spread 5.00% [13],[26] 5.00% [14],[15]
Principal $ 14,964 [13],[26] $ 15,109 [14],[15]
Investment, cost 14,690 [13],[26] 14,778 [14],[15]
Total Level 3 investments $ 14,290 [13],[26] $ 15,071 [14],[15]
Investment, Identifier [Axis]: Tectonic Financial, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 200,000 [28] 200,000 [29]
Investment, cost $ 2,000 [28] $ 2,000 [29]
Total Level 3 investments $ 5,630 [28] $ 4,650 [29]
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 544 505
Investment, cost $ 9,245 $ 8,579
Total Level 3 investments $ 7,681 $ 8,579
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   12.00%
Principal   $ 16,240
Investment, cost   16,181
Total Level 3 investments   $ 16,181
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.00%  
Principal $ 1,840  
Investment, cost 1,840  
Total Level 3 investments $ 1,840  
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00%  
Principal $ 15,200  
Investment, cost 15,192  
Total Level 3 investments $ 15,120  
Investment, Identifier [Axis]: Televerde, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 460 460
Investment, cost $ 1,290 $ 1,290
Total Level 3 investments $ 5,408 $ 7,280
Investment, Identifier [Axis]: Televerde, LLC, Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 248  
Investment, cost $ 718  
Total Level 3 investments $ 1,794  
Investment, Identifier [Axis]: Tex Tech Tennis, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [8],[38]   1,000,000
Investment, cost [8],[38]   $ 1,000
Total Level 3 investments [8],[38]   $ 1,000
Investment, Identifier [Axis]: Tex Tech Tennis, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) [7],[37] 1,000,000  
Investment, cost [7],[37] $ 1,000  
Total Level 3 investments [7],[37] $ 1,830  
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 1,280,000 [28] 1,280,000 [29]
Investment, cost $ 6,400 [28] $ 6,400 [29]
Total Level 3 investments $ 6,400 [28] $ 6,400 [29]
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 13.00% 7.00%
Principal $ 120 $ 280
Investment, cost 106 262
Total Level 3 investments $ 106 $ 262
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.00% 11.83%
Principal $ 9,521 $ 12,961
Investment, cost 9,442 12,834
Total Level 3 investments $ 9,442 $ 12,834
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 615 [28] 615 [29]
Investment, cost $ 4,655 [28] $ 4,655 [29]
Total Level 3 investments 7,800 [28] $ 8,660 [29]
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate   12.00%
Principal   $ 8,720
Investment, cost   8,663
Total Level 3 investments   $ 8,712
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal [27] 0  
Investment, cost [27] (5)  
Total Level 3 investments [27] $ 0  
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00%  
Principal $ 7,920  
Investment, cost 7,894  
Total Level 3 investments $ 7,920  
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 11.57% [13],[25],[26] 7.00% [14],[15]
Spread 1.25% [13],[25],[26] 6.00% [14],[15]
PIK Rate [13],[25],[26] 7.25%  
Principal $ 18,352 [13],[25],[26] $ 17,088 [14],[15]
Investment, cost 18,284 [13],[25],[26] 16,985 [14],[15]
Total Level 3 investments $ 6,859 [13],[25],[26] $ 12,917 [14],[15]
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.82% [7],[26] 6.75% [8],[15]
Spread 5.75% [7],[26] 5.75% [8],[15]
Principal $ 33,577 [7],[26] $ 37,281 [8],[15]
Investment, cost 33,031 [7],[26] 36,510 [8],[15]
Total Level 3 investments $ 33,577 [7],[26] $ 37,281 [8],[15]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 945,507 [13] 945,507 [14]
Investment, cost $ 0 [13] $ 0 [14]
Total Level 3 investments $ 0 [13] $ 0 [14]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) [14]   2,281,682
Total Rate [14]   19.00%
PIK Rate [14]   19.00%
Investment, cost [14]   $ 3,667
Total Level 3 investments [14]   $ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 1    
Schedule of Investments [Line Items]    
Units (in shares) 1,133,102 [13],[28] 1,133,102 [14],[29]
Total Rate 20.00% [13],[28] 20.00% [14],[29]
PIK Rate 20.00% [13],[28] 20.00% [14],[29]
Investment, cost $ 2,141 [13],[28] $ 1,757 [14],[29]
Total Level 3 investments $ 2,833 [13],[28] $ 2,833 [14],[29]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 2    
Schedule of Investments [Line Items]    
Units (in shares) 1,521,122 [13] 1,521,122 [14]
Total Rate 20.00% [13] 20.00% [14]
PIK Rate 20.00% [13] 20.00% [14]
Investment, cost $ 2,188 [13] $ 2,188 [14]
Total Level 3 investments $ 1,991 [13] $ 1,498 [14]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 3    
Schedule of Investments [Line Items]    
Units (in shares) 2,281,682 [13] 4,336,866 [14]
Total Rate 19.00% [13] 13.50% [14]
PIK Rate 19.00% [13] 13.50% [14]
Investment, cost $ 3,667 [13] $ 7,924 [14]
Total Level 3 investments $ 0 [13] $ 0 [14]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 4    
Schedule of Investments [Line Items]    
Units (in shares) [13] 4,336,866  
Total Rate [13] 13.50%  
PIK Rate [13] 13.50%  
Investment, cost [13] $ 7,924  
Total Level 3 investments [13] $ 0  
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt    
Schedule of Investments [Line Items]    
Total Rate 15.00% [13] 15.00% [14]
PIK Rate 15.00% [13] 15.00% [14]
Principal $ 2,403 [13] $ 1,197 [14]
Investment, cost 2,403 [13] 1,197 [14]
Total Level 3 investments $ 4,592 [13] $ 2,375 [14]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.76% [13],[25],[26] 8.50% [14],[15]
Spread 5.50% [13],[25],[26] 5.50% [14],[15]
PIK Rate 2.00% [13],[25],[26] 2.00% [14],[15]
Principal $ 406 [13],[25],[26] $ 397 [14],[15]
Investment, cost 405 [13],[25],[26] 396 [14],[15]
Total Level 3 investments $ 382 [13],[25],[26] $ 371 [14],[15]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.76% [13],[25],[26] 8.50% [14],[15]
Spread 5.50% [13],[25],[26] 5.50% [14],[15]
PIK Rate 2.00% [13],[25],[26] 2.00% [14],[15]
Principal $ 1,814 [13],[25],[26] $ 1,986 [14],[15]
Investment, cost 1,807 [13],[25],[26] 1,974 [14],[15]
Total Level 3 investments $ 1,712 [13],[25],[26] $ 1,852 [14],[15]
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests    
Schedule of Investments [Line Items]    
Units (percentage) 11.11% [9],[10],[28],[40] 49.60% [11],[12],[29],[41]
Investment, cost $ 3,734 [9],[10],[28],[40] $ 3,828 [11],[12],[29],[41]
Total Level 3 investments $ 5,855 [9],[10],[28],[40] $ 6,122 [11],[12],[29],[41]
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 4,000,000 [7],[37] 4,000,000 [8],[38]
Investment, cost $ 4,000 [7],[37] $ 4,000 [8],[38]
Total Level 3 investments $ 0 [7],[37] $ 0 [8],[38]
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 716,949 [7],[37] 716,949 [8],[38]
Total Rate 14.00% [7],[37] 14.00% [8],[38]
PIK Rate 14.00% [7],[37] 14.00% [8],[38]
Investment, cost $ 1,032 [7],[37] $ 1,032 [8],[38]
Total Level 3 investments $ 220 [7],[37] $ 0 [8],[38]
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 1,038,462 [7],[28] 1,038,462 [8]
Investment, cost $ 1,038 [7],[28] $ 1,038 [8]
Total Level 3 investments $ 3,930 [7],[28] $ 1,038 [8]
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.50%
Spread [8],[15]   7.50%
Principal [8],[15]   $ 25,962
Investment, cost [8],[15]   25,450
Total Level 3 investments [8],[15]   $ 25,450
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 11,840 [28],[37] 11,840 [38]
Investment, cost $ 11,840 [28],[37] $ 11,840 [38]
Total Level 3 investments $ 11,940 [28],[37] $ 11,840 [38]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [15],[38]   7.00%
Spread 6.00% [26],[27],[37] 6.00% [15],[38]
Principal $ 0 [26],[27],[37] $ 1,200 [15],[38]
Investment, cost (21) [26],[27],[37] 1,170 [15],[38]
Total Level 3 investments $ (21) [26],[27],[37] $ 1,169 [15],[38]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.50% [37] 11.50% [38]
Principal $ 30,400 [37] $ 30,400 [38]
Investment, cost 30,158 [37] 30,100 [38]
Total Level 3 investments $ 30,161 [37] $ 30,100 [38]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [14],[15]   6.25%
Spread 5.25% [13],[26],[27] 5.25% [14],[15]
Principal $ 0 [13],[26],[27] $ 5,875 [14],[15]
Investment, cost (630) [13],[26],[27] 5,111 [14],[15]
Total Level 3 investments $ (630) [13],[26],[27] $ 5,111 [14],[15]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.41% [13],[26] 7.00% [14],[15]
Spread 6.00% [13],[26] 6.00% [14],[15]
Principal $ 17,685 [13],[26] $ 14,888 [14],[15]
Investment, cost 17,381 [13],[26] 14,524 [14],[15]
Total Level 3 investments $ 15,479 [13],[26] $ 14,925 [14],[15]
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.38% [13] 6.10% [14]
Spread 6.00% [13] 6.00% [14]
Principal $ 15,448 [13] $ 17,089 [14]
Investment, cost 15,313 [13] 16,905 [14]
Total Level 3 investments $ 12,049 [13] $ 15,850 [14]
Investment, Identifier [Axis]: Vision Interests, Inc., Series A Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 3,000,000 [28] 3,000,000
Investment, cost $ 3,000 [28] $ 3,000
Total Level 3 investments $ 3,000 [28] $ 3,000
Investment, Identifier [Axis]: Vistar Media, Inc., Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 70,207 [7] 70,207 [8]
Investment, cost $ 767 [7] $ 767 [8]
Total Level 3 investments $ 2,250 [7] $ 1,726 [8]
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 4,876,670 4,876,670
Investment, cost $ 14,000 $ 14,000
Total Level 3 investments $ 0 $ 5,990
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 11.50% [36] 11.50% [33]
Principal $ 16,734 [36] $ 17,434 [33]
Investment, cost 16,734 [36] 17,434 [33]
Total Level 3 investments $ 14,914 [36] $ 17,434 [33]
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt    
Schedule of Investments [Line Items]    
Total Rate 8.00% 8.00%
Principal $ 409 $ 409
Investment, cost 409 409
Total Level 3 investments $ 0 $ 409
Investment, Identifier [Axis]: Volusion, LLC, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 1,831,355 [23] 1,831,355 [24]
Investment, cost $ 2,576 [23] $ 2,576 [24]
Total Level 3 investments $ 0 [23] $ 0 [24]
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.64% [13],[25],[26] 6.75% [14],[15]
Spread 5.75% [13],[25],[26] 5.75% [14],[15]
Principal $ 14,625 [13],[25],[26] $ 15,000 [14],[15]
Investment, cost 14,268 [13],[25],[26] 14,569 [14],[15]
Total Level 3 investments $ 8,409 [13],[25],[26] $ 14,916 [14],[15]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 400,000 [7] 400,000 [8]
Investment, cost $ 400 [7] $ 400 [8]
Total Level 3 investments $ 420 [7] $ 400 [8]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.00%
Spread [8],[15]   7.00%
Principal [8],[15]   $ 4,373
Investment, cost [8],[15]   4,288
Total Level 3 investments [8],[15]   $ 4,285
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 7.00%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (6)  
Total Level 3 investments [7],[26],[27] $ (6)  
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.74%  
Spread [7],[26] 7.00%  
Principal [7],[26] $ 4,235  
Investment, cost [7],[26] 4,173  
Total Level 3 investments [7],[26] $ 4,146  
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   7.25%
Spread [8],[15]   6.25%
Principal [8],[15]   $ 25,876
Investment, cost [8],[15]   25,267
Total Level 3 investments [8],[15]   $ 25,267
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.73%  
Spread [7],[26] 6.00%  
Principal [7],[26] $ 371  
Investment, cost [7],[26] 334  
Total Level 3 investments [7],[26] $ 370  
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.73%  
Spread [7],[26] 6.00%  
Principal [7],[26] $ 391  
Investment, cost [7],[26] 361  
Total Level 3 investments [7],[26] $ 391  
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.73%  
Spread [7],[26] 6.00%  
Principal [7],[26] $ 28,957  
Investment, cost [7],[26] 28,591  
Total Level 3 investments [7],[26] $ 28,947  
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [7] 1,541,400  
Investment, cost [7] $ 1,541  
Total Level 3 investments [7] $ 1,950  
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[25],[26],[27] 6.00%  
Principal [7],[25],[26],[27] $ 0  
Investment, cost [7],[25],[26],[27] (20)  
Total Level 3 investments [7],[25],[26],[27] $ (20)  
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 8.59%  
Spread [7],[25],[26] 6.00%  
Principal [7],[25],[26] $ 10,794  
Investment, cost [7],[25],[26] 10,608  
Total Level 3 investments [7],[25],[26] $ 10,685  
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   8.00%
Spread [8],[15]   7.00%
Principal [8],[15]   $ 10,278
Investment, cost [8],[15]   10,018
Total Level 3 investments [8],[15]   $ 10,061
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 7.00%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (34)  
Total Level 3 investments [7],[26],[27] $ 0  
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Spread [7],[26],[27] 7.00%  
Principal [7],[26],[27] $ 0  
Investment, cost [7],[26],[27] (17)  
Total Level 3 investments [7],[26],[27] $ (17)  
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7],[26] 10.74%  
Spread [7],[26] 7.00%  
Principal [7],[26] $ 10,000  
Investment, cost [7],[26] 9,848  
Total Level 3 investments [7],[26] $ 9,992  
Investment, Identifier [Axis]: World Micro Holdings, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 3,845  
Investment, cost $ 3,845  
Total Level 3 investments $ 3,845  
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 13.00%  
Principal $ 14,280  
Investment, cost 14,140  
Total Level 3 investments $ 14,140  
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [8],[15]   6.75%
Spread [8],[15]   6.00%
Principal [8],[15]   $ 38,600
Investment, cost [8],[15]   37,423
Total Level 3 investments [8],[15]   $ 37,423
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Spread [7],[27] 5.25%  
Principal [7],[27] $ 0  
Investment, cost [7],[27] (218)  
Total Level 3 investments [7],[27] $ (218)  
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7] 10.84%  
Spread [7] 5.25%  
Principal [7] $ 24,300  
Investment, cost [7] 23,864  
Total Level 3 investments [7] $ 24,135  
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [7] 8.63%  
Spread [7] 5.25%  
Principal [7] $ 38,311  
Investment, cost [7] 37,691  
Total Level 3 investments [7] $ 38,051  
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.51% [13],[26] 6.50% [14],[15]
Spread 5.50% [13],[26] 5.50% [14],[15]
Principal $ 12,659 [13],[26] $ 13,034 [14],[15]
Investment, cost 12,619 [13],[26] 12,967 [14],[15]
Total Level 3 investments $ 12,127 [13],[26] $ 12,578 [14],[15]
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 10,072 10,072
Investment, cost $ 2,834 $ 2,834
Total Level 3 investments $ 240 $ 2,130
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 450 $ 625
Investment, cost 450 625
Total Level 3 investments $ 450 $ 625
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 6.50% 6.50%
Principal $ 1,000 $ 1,000
Investment, cost 1,000 1,000
Total Level 3 investments $ 945 $ 1,000
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 14.00% 14.00%
Principal $ 2,750 $ 2,750
Investment, cost 2,750 2,750
Total Level 3 investments $ 2,676 $ 2,750
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 587 [23] 587 [24]
Investment, cost $ 600 [23] $ 600 [24]
Total Level 3 investments $ 0 [23] $ 0 [24]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26] 11.67%  
Spread [7],[25],[26] 7.25%  
Principal [7],[25],[26] $ 17,512  
Investment, cost [7],[25],[26] 17,279  
Total Level 3 investments [7],[25],[26] $ 17,512  
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [7],[25],[26],[70] 11.67%  
Spread [7],[25],[26],[70] 7.25%  
Principal [7],[25],[26],[70] $ 4,389  
Investment, cost [7],[25],[26],[70] 4,360  
Total Level 3 investments [7],[25],[26],[70] $ 4,379  
[1] All investments are Lower Middle Market portfolio investments, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Lower Middle Market portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Company’s Corporate Facility or SPV Facility (each as defined in Note B.5. — Deferred Financing Costs, and together the “Credit Facilities”) or in support of the SBA-guaranteed debentures issued by the Funds.
[2] Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.
[3] All investments are Lower Middle Market portfolio investments, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Lower Middle Market portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Company’s Corporate Facility or in support of the SBA-guaranteed debentures issued by the Funds.
[4] Principal is net of repayments. Cost is net of repayments and accumulated unearned income.
[5] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.
[6] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion.
[7] Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments.
[8] Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments.
[9] Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments.
[10] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.
[11] Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments.
[12] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.
[13] Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments.
[14] Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments.
[15] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 67% of these floating rate loans (based on the par amount) contain LIBOR floors which range between 0.50% and 2.00%, with a weighted-average LIBOR floor of 1.06%.
[16] Portfolio company headquarters are located outside of the United States.
[17] Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.
[18] Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.
[19] Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.
[20] Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.
[21] Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.
[22] Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.
[23] Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit.
[24] Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit.
[25] A majority of the variable rate loans in the Company’s Investment Portfolio bear interest at a rate that may be determined by reference to either LIBOR (“L”), SOFR (“SF”) or an alternate Base rate (commonly based on the Federal Funds Rate or the Prime rate (“P”)), which typically resets every one, three, or six months at the borrower’s option. SOFR based contracts may include a credit spread adjustment (the “Adjustment”) that is charged in addition to the stated spread. The Adjustment is applied when the SOFR rate, plus the Adjustment, exceeds the stated floor rate, as applicable. As of December 31, 2022, SOFR based contracts in the portfolio had Adjustments ranging from 0.10% to 0.35%.
[26] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 66% of these floating rate loans (based on the par amount) contain LIBOR or Term SOFR (“SOFR”) floors which range between 0.50% and 2.00%, with a weighted-average floor of 1.04%.
[27] The position is unfunded and no interest income is being earned as of December 31, 2022. The position may earn a nominal unused facility fee on committed amounts.
[28] Income producing through dividends or distributions.
[29] Income producing through dividends or distributions.
[30] Non-accrual and non-income producing investment.
[31] Non-accrual and non-income producing investment.
[32] Index based floating interest rate is subject to contractual maximum base rate of 2.50%.
[33] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
[34] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR+6.00% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[35] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR+7.25% (Floor 1.25%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[36] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
[37] Shares/Units represent ownership in a related Real Estate or HoldCo entity.
[38] Shares/Units represent ownership in a related Real Estate or HoldCo entity.
[39] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR+8.00% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[40] Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated.
[41] Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated.
[42] The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.
[43] The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.
[44] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+6.25% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[45] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+6.25% (Floor 1.00%). Due to an amendment and subsequent funding during the quarter, the term loan facility has different floating rate reset dates. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[46] As of December 31, 2022, borrowings under the loan facility bore interest at LIBOR+8.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[47] Warrants are presented in equivalent units with a strike price of $1.50 per unit.
[48] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR+7.96% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[49] Index based floating interest rate is subject to contractual maximum base rate of 1.50%.
[50] Index based floating interest rate is subject to contractual maximum index rate of 1.50% as of December 31, 2021.
[51] Portfolio company headquarters are located outside of the United States.
[52] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+5.75% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[53] As of December 31, 2022, borrowings under the loan facility bore interest at LIBOR+6.50% PIK or Prime+5.50% PIK. Revolving facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[54] As of December 31, 2021, borrowings under the loan facility bore interest at LIBOR+6.00% or Prime+5.00%. Delayed draw term loan facility permits the borrower to make an interest rate election on each new tranche of borrowings under the facility. The rate presented represents a weighted-average rate for borrowings under the facility.
[55] Warrants are presented in equivalent shares/units with a strike price of $1.00 per share/unit.
[56] As of December 31, 2022, borrowings under the loan facility bore interest at LIBOR+10.00%. RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[57] External Investment Manager. Investment is not encumbered as security for the Company’s Credit Facilities or in support of the SBA-guaranteed debentures issued by the Funds.
[58] External Investment Manager. Investment is not encumbered as security for the Company’s Corporate Facility or in support of the SBA-guaranteed debentures issued by the Funds.
[59] As of December 31, 2022, borrowings under the loan facility bore interest at LIBOR+7.25% (Floor 0.75%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[60] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[61] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+5.75% (Floor 1.00%). Delayed draw term loan facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[62] Warrants are presented in equivalent units with a strike price of $14.28 per unit.
[63] Warrants are presented in equivalent units with a strike price of $14.28 per unit.
[64] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+7.75% (Floor 1.25%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[65] Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.
[66] Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.
[67] In connection with the Company’s debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company’s investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $16.9 million Canadian Dollars and receive $13.1 million U.S. Dollars with a settlement date of September 14, 2023. The unrealized appreciation on the forward foreign currency contract was $0.6 million as of December 31, 2022.
[68] In connection with the Company’s debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company’s investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $21.4 million Canadian Dollars and receive $16.9 million U.S. Dollars with a settlement date of September 14, 2022. The unrealized depreciation on the forward foreign currency contract was not significant as of December 31, 2021.
[69] Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.
[70] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). Each new draw on the delayed draw term loan facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[71] Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.