Quarterly report pursuant to Section 13 or 15(d)

Consolidated Schedule of Investments

v3.23.1
Consolidated Schedule of Investments - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Schedule of Investments [Line Items]      
Cost $ 1,062,976 [1] $ 1,059,886 [2]  
Fair value $ 1,067,094 [3] $ 1,068,143 [4]  
Investment owned, percent of net assets 175.00% 175.20%  
GRT Rubber Technologies LLC      
Schedule of Investments [Line Items]      
Cost $ 26,669 $ 26,512  
Fair value 42,309 42,163  
Analytical Systems Keco Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 2,606 2,619  
Fair value 2,020 2,013  
ATX Networks Corp.      
Schedule of Investments [Line Items]      
Cost [5]   8,603  
Fair value [5]   12,272  
Batjer TopCo, LLC      
Schedule of Investments [Line Items]      
Cost 1,611 1,659  
Fair value 1,836 1,659  
Brewer Crane Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 2,530 2,561  
Fair value 3,100 3,261  
Centre Technologies Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 5,264 5,262  
Fair value 6,053 5,901  
Chamberlin Holding LLC      
Schedule of Investments [Line Items]      
Cost 7,536 7,531  
Fair value 10,644 10,642  
Clad-Rex Steel, LLC      
Schedule of Investments [Line Items]      
Cost 4,631 4,753  
Fair value 4,755 5,092  
Cody Pools, Inc.      
Schedule of Investments [Line Items]      
Cost 8,980 9,126  
Fair value 21,792 21,705  
Colonial Electric Company LLC      
Schedule of Investments [Line Items]      
Cost 7,579 7,649  
Fair value 7,709 8,019  
Datacom, LLC      
Schedule of Investments [Line Items]      
Cost 1,233 1,210  
Fair value 1,214 1,190  
Digital Products Holdings LLC      
Schedule of Investments [Line Items]      
Cost 6,176 6,253  
Fair value 6,260 6,337  
Direct Marketing Solutions, Inc.      
Schedule of Investments [Line Items]      
Cost 7,326 7,401  
Fair value 10,702 10,910  
Flame King Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 9,671 9,660  
Fair value 12,500 11,600  
Gamber-Johnson Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 19,987 20,170  
Fair value 30,660 28,740  
GFG Group, LLC.      
Schedule of Investments [Line Items]      
Cost 4,008 4,004  
Fair value 4,736 4,626  
Gulf Publishing Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 2,920 2,920  
Fair value 1,521 1,521  
Kickhaefer Manufacturing Company, LLC      
Schedule of Investments [Line Items]      
Cost 9,393 9,344  
Fair value 8,599 8,567  
Market Force Information, LLC      
Schedule of Investments [Line Items]      
Cost 10,623 10,623  
Fair value 0 403  
MH Corbin Holding LLC      
Schedule of Investments [Line Items]      
Cost 4,110 4,139  
Fair value 1,346 1,137  
Mystic Logistics Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 2,116 2,116  
Fair value 7,689 7,144  
NexRev LLC      
Schedule of Investments [Line Items]      
Cost 4,730 4,881  
Fair value 2,967 2,399  
NuStep, LLC      
Schedule of Investments [Line Items]      
Cost 8,767 8,765  
Fair value 8,904 9,003  
Oneliance, LLC      
Schedule of Investments [Line Items]      
Cost 1,625 1,644  
Fair value 1,625 1,644  
Orttech Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 8,121 8,312  
Fair value 8,991 8,752  
Robbins Bros. Jewelry, Inc.      
Schedule of Investments [Line Items]      
Cost 5,105 5,124  
Fair value 4,975 5,544  
SI East, LLC      
Schedule of Investments [Line Items]      
Cost 28,506 30,201  
Fair value 32,729 34,479  
Sonic Systems International, LLC      
Schedule of Investments [Line Items]      
Cost 19,746 [6] 19,727 [7]  
Fair value 19,855 [6] 19,915 [7]  
Student Resource Center, LLC      
Schedule of Investments [Line Items]      
Cost 5,063 [6] 5,063 [7]  
Fair value 5,063 [6] 5,063 [7]  
Tedder Industries, LLC      
Schedule of Investments [Line Items]      
Cost 6,624 6,568  
Fair value 6,042 6,160  
Trantech Radiator Topco, LLC      
Schedule of Investments [Line Items]      
Cost 3,125 3,121  
Fair value 4,310 3,930  
Volusion, LLC      
Schedule of Investments [Line Items]      
Cost 12,910 14,451  
Fair value 5,806 6,392  
VVS Holdco, LLC      
Schedule of Investments [Line Items]      
Cost 10,387 10,376  
Fair value 10,437 10,406  
AAC Holdings, Inc.      
Schedule of Investments [Line Items]      
Cost 7,438 [8] 7,111 [5]  
Fair value 4,324 [8] 4,110 [5]  
AB Centers Acquisition Corporation      
Schedule of Investments [Line Items]      
Cost 2,301 [6] 2,002 [7]  
Fair value 2,364 [6] 2,064 [7]  
Acumera, Inc.      
Schedule of Investments [Line Items]      
Cost 6,091 [6] 5,859 [7]  
Fair value 6,225 [6] 5,995 [7]  
Adams Publishing Group, LLC      
Schedule of Investments [Line Items]      
Cost 3,637 [6] 3,384 [7]  
Fair value 3,606 [6] 3,391 [7]  
AMEREQUIP LLC.      
Schedule of Investments [Line Items]      
Cost 2,104 [6] 2,106 [7]  
Fair value 2,111 [6] 2,105 [7]  
American Health Staffing Group, Inc.      
Schedule of Investments [Line Items]      
Cost 8,178 [6] 8,193 [7]  
Fair value 8,238 [6] 8,258 [7]  
American Nuts, LLC      
Schedule of Investments [Line Items]      
Cost 8,398 [6] 8,833 [7]  
Fair value 7,238 [6] 8,309 [7]  
American Teleconferencing Services, Ltd.      
Schedule of Investments [Line Items]      
Cost 13,826 [8] 13,826 [5]  
Fair value 723 [8] 794 [5]  
ArborWorks, LLC      
Schedule of Investments [Line Items]      
Cost 17,991 [6] 18,091 [7]  
Fair value 14,618 [6] 15,408 [7]  
Archer Systems, LLC      
Schedule of Investments [Line Items]      
Cost 2,219 [6] 2,223 [7]  
Fair value 2,221 [6] 2,228 [7]  
ATS Operating, LLC      
Schedule of Investments [Line Items]      
Cost 1,966 [6] 1,914 [7]  
Fair value 1,970 [6] 1,920 [7]  
AVEX Aviation Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 4,295 [6] 3,918 [7]  
Fair value 4,296 [6] 3,924 [7]  
BBB Tank Services, LLC      
Schedule of Investments [Line Items]      
Cost 1,441 1,441  
Fair value 722 722  
Berry Aviation, Inc.      
Schedule of Investments [Line Items]      
Cost 1,381 [6] 1,350 [7]  
Fair value 6,081 [6] 5,021 [7]  
Bettercloud, Inc.      
Schedule of Investments [Line Items]      
Cost 7,954 [6] 7,826 [7]  
Fair value 8,090 [6] 7,969 [7]  
Bluestem Brands, Inc.      
Schedule of Investments [Line Items]      
Cost 5,036 [8] 3,566 [5]  
Fair value 8,270 [8] 9,247 [5]  
Boccella Precast Products LLC      
Schedule of Investments [Line Items]      
Cost 644 644  
Fair value 772 821  
Brightwood Capital Fund Investments      
Schedule of Investments [Line Items]      
Cost 11,186 [9],[10] 11,186 [11],[12]  
Fair value 10,857 [9],[10] 10,658 [11],[12]  
Buca C, LLC      
Schedule of Investments [Line Items]      
Cost 14,530 14,780  
Fair value 8,095 8,345  
Burning Glass Intermediate Holding Company, Inc.      
Schedule of Investments [Line Items]      
Cost 13,544 [6] 13,051 [7]  
Fair value 13,738 [6] 13,255 [7]  
Cadence Aerospace LLC      
Schedule of Investments [Line Items]      
Cost [6] 20,578    
Fair value [6] 20,610    
CAI Software LLC      
Schedule of Investments [Line Items]      
Cost 379 379  
Fair value 379 379  
Career Team Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 2,697 2,693  
Fair value 2,697 2,693  
CaseWorthy, Inc.      
Schedule of Investments [Line Items]      
Cost 4,630 [6] 4,627 [7]  
Fair value 4,648 [6] 4,645 [7]  
Channel Partners Intermediateco, LLC      
Schedule of Investments [Line Items]      
Cost 4,121 [6] 3,692 [7]  
Fair value 4,112 [6] 3,708 [7]  
Classic H&G Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 7,325 7,321  
Fair value 12,389 12,119  
Computer Data Source, LLC      
Schedule of Investments [Line Items]      
Cost 19,444 [6] 19,480 [7]  
Fair value 17,975 [6] 18,272 [7]  
Dalton US Inc.      
Schedule of Investments [Line Items]      
Cost 1,239 [6] 1,088 [7]  
Fair value 1,241 [6] 1,107 [7]  
DMA Industries, LLC      
Schedule of Investments [Line Items]      
Cost 6,708 6,703  
Fair value 7,120 7,120  
DTE Enterprises, LLC      
Schedule of Investments [Line Items]      
Cost 7,598 [6] 8,046 [7]  
Fair value 7,204 [6] 7,518 [7]  
Dynamic Communities, LLC      
Schedule of Investments [Line Items]      
Cost 3,487 [6] 3,487 [7]  
Fair value 3,487 [6] 3,487 [7]  
Elgin AcquireCo, LLC      
Schedule of Investments [Line Items]      
Cost 2,203 2,201  
Fair value 2,203 2,201  
Engineering Research & Consulting, LLC      
Schedule of Investments [Line Items]      
Cost 5,359 [6] 5,097 [7]  
Fair value 5,417 [6] 5,200 [7]  
Event Holdco, LLC      
Schedule of Investments [Line Items]      
Cost 3,970 [6] 3,968 [7]  
Fair value 3,796 [6] 3,799 [7]  
Flip Electronics LLC      
Schedule of Investments [Line Items]      
Cost 13,169 [6] 12,873 [7]  
Fair value 13,418 [6] 13,145 [7]  
Hawk Ridge Systems, LLC      
Schedule of Investments [Line Items]      
Cost 9,900 9,694  
Fair value 13,800 13,596  
HDC/HW Intermediate Holdings      
Schedule of Investments [Line Items]      
Cost 2,025 [6] 1,951 [7]  
Fair value 1,980 [6] 1,906 [7]  
HEADLANDS OP-CO LLC      
Schedule of Investments [Line Items]      
Cost 4,842 [6] 4,848 [7]  
Fair value 4,929 [6] 4,939 [7]  
IG Parent Corporation      
Schedule of Investments [Line Items]      
Cost 8,158 [8] 8,633 [5]  
Fair value 8,187 [8] 8,756 [5]  
Independent Pet Partners Intermediate Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 16,946 [6] 14,564 [7]  
Fair value 6,359 [6] 4,974 [7]  
Industrial Services Acquisition, LLC      
Schedule of Investments [Line Items]      
Cost 14,535 [6] 13,713 [7]  
Fair value 14,032 [6] 13,213 [7]  
Infinity X1 Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 5,411    
Fair value 5,411    
Infolinks Media Buyco, LLC      
Schedule of Investments [Line Items]      
Cost 10,515 [6] 10,528 [7]  
Fair value 10,669 [6] 10,694 [7]  
Interface Security Systems, L.L.C      
Schedule of Investments [Line Items]      
Cost 9,089 [6] 8,936 [7]  
Fair value 2,866 [6] 2,767 [7]  
Invincible Boat Company, LLC.      
Schedule of Investments [Line Items]      
Cost 17,522 [6] 17,668 [7]  
Fair value 17,615 [6] 17,770 [7]  
Iron-Main Investments, LLC      
Schedule of Investments [Line Items]      
Cost 12,282 9,377  
Fair value 12,282 9,377  
Jackmont Hospitality, Inc.      
Schedule of Investments [Line Items]      
Cost 5,235 [6] 5,333 [7]  
Fair value 6,039 [6] 6,373 [7]  
Joerns Healthcare, LLC      
Schedule of Investments [Line Items]      
Cost 9,051 [8] 8,938 [5]  
Fair value 2,281 [8] 2,353 [5]  
Johnson Downie Opco, LLC      
Schedule of Investments [Line Items]      
Cost 1,442 1,440  
Fair value 1,841 1,731  
JorVet Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 3,998 3,995  
Fair value 3,998 3,995  
JTI Electrical & Mechanical, LLC      
Schedule of Investments [Line Items]      
Cost 3,143 [6] 3,139 [7]  
Fair value 3,289 [6] 3,288 [7]  
KMS, LLC      
Schedule of Investments [Line Items]      
Cost 10,466 [6] 10,488 [7]  
Fair value 9,997 [6] 10,022 [7]  
LL Management, Inc.      
Schedule of Investments [Line Items]      
Cost 22,962 [6] 22,944 [7]  
Fair value 22,757 [6] 22,884 [7]  
Mako Steel, LP      
Schedule of Investments [Line Items]      
Cost 18,756 [6] 20,240 [7]  
Fair value 18,832 [6] 20,385 [7]  
MB2 Dental Solutions, LLC      
Schedule of Investments [Line Items]      
Cost 16,890 [8] 16,006 [5]  
Fair value 17,115 [8] 16,235 [5]  
MetalForming AcquireCo, LLC      
Schedule of Investments [Line Items]      
Cost 2,262 2,250  
Fair value 2,262 2,250  
Microbe Formulas, LLC      
Schedule of Investments [Line Items]      
Cost 3,039 [6] 3,078 [7]  
Fair value 2,988 [6] 3,027 [7]  
MonitorUS Holding, LLC      
Schedule of Investments [Line Items]      
Cost 8,451 [6],[10],[13] 7,885 [7],[12],[14]  
Fair value 8,806 [6],[10],[13] 8,282 [7],[12],[14]  
NinjaTrader, LLC      
Schedule of Investments [Line Items]      
Cost 11,517 [6] 11,500 [7]  
Fair value 11,614 [6] 11,611 [7]  
NWN Corporation      
Schedule of Investments [Line Items]      
Cost 25,593 [6] 25,060 [7]  
Fair value 24,516 [6] 24,167 [7]  
Paragon Healthcare, Inc.      
Schedule of Investments [Line Items]      
Cost 2,966 [6] 2,704 [7]  
Fair value 2,970 [6] 2,736 [7]  
PTL US Bidco, Inc      
Schedule of Investments [Line Items]      
Cost 1,879 [6],[10] 1,805 [12]  
Fair value 1,869 [6],[10] 1,816 [12]  
RA Outdoors LLC      
Schedule of Investments [Line Items]      
Cost 13,160 [6] 12,778 [7]  
Fair value 11,978 [6] 11,674 [7]  
RM Bidder, LLC      
Schedule of Investments [Line Items]      
Cost 315 [6] 315 [7]  
Fair value 14 [6] 13 [7]  
Roof Opco, LLC      
Schedule of Investments [Line Items]      
Cost 6,738 [6] 7,116 [7]  
Fair value 6,785 [6] 7,273 [7]  
Rug Doctor, LLC.      
Schedule of Investments [Line Items]      
Cost 15,415 [6] 15,402 [7]  
Fair value 14,262 [6] 13,890 [7]  
SIB Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 12,376 [6] 12,245 [7]  
Fair value 11,257 [6] 11,451 [7]  
Slick Innovations, LLC      
Schedule of Investments [Line Items]      
Cost 3,397 3,448  
Fair value 3,870 3,860  
South Coast Terminals Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 3,516 [6] 3,522 [7]  
Fair value 3,600 [6] 3,609 [7]  
SPAU Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 5,063 [6] 5,069 [7]  
Fair value 5,145 [6] 5,157 [7]  
The Affiliati Network, LLC      
Schedule of Investments [Line Items]      
Cost 3,892 3,967  
Fair value 3,892 3,967  
Wall Street Prep, Inc.      
Schedule of Investments [Line Items]      
Cost 5,716 [6] 5,745 [7]  
Fair value 5,711 [6] 5,739 [7]  
Watterson Brands, LLC      
Schedule of Investments [Line Items]      
Cost 4,420 [6] 4,180 [7],[15]  
Fair value 4,466 [6] 4,245 [7],[15]  
West Star Aviation Acquisition, LLC      
Schedule of Investments [Line Items]      
Cost 3,116 [6] 3,120 [7]  
Fair value 3,244 [6] 3,192 [7]  
Winter Services LLC      
Schedule of Investments [Line Items]      
Cost 12,235 [6] 12,219 [7]  
Fair value 12,457 [6] 12,444 [7]  
World Micro Holdings, LLC      
Schedule of Investments [Line Items]      
Cost 2,462 2,460  
Fair value 2,462 2,460  
Xenon Arc, Inc.      
Schedule of Investments [Line Items]      
Cost 3,555 [6] 3,495 [7]  
Fair value 3,597 [6] 3,540 [7]  
Zips Car Wash, LLC      
Schedule of Investments [Line Items]      
Cost 2,951 [6] 2,951 [7]  
Fair value 2,978 [6] 2,985 [7]  
Money market accounts and money market funds      
Schedule of Investments [Line Items]      
Cost [1],[16] 18,415    
Fair value [3],[16] 18,415    
Short-term investments      
Schedule of Investments [Line Items]      
Cost [2],[17]   8,347  
Fair value [4],[17]   8,347  
Control investments      
Schedule of Investments [Line Items]      
Cost 31,409 [1],[18] 31,120 [2],[19]  
Fair value $ 49,906 [3],[18] $ 50,303 [4],[19]  
Investment owned, percent of net assets 8.20% 8.30%  
Affiliate investments      
Schedule of Investments [Line Items]      
Cost $ 242,145 [1],[20] $ 241,565 [2],[21]  
Fair value $ 270,841 [3],[20] $ 277,000 [4],[21]  
Investment owned, percent of net assets 44.40% 45.40%  
Non‑Control/Non‑Affiliate investments      
Schedule of Investments [Line Items]      
Cost $ 789,422 [1],[22] $ 787,201 [2],[23]  
Fair value $ 746,347 [3],[22] $ 740,840 [4],[23]  
Investment owned, percent of net assets 122.40% 121.50%  
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 593,927 [8] 593,927 [5]  
Cost $ 3,148 [8] $ 3,148 [5]  
Fair value $ 0 [8] $ 0 [5]  
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate [5]   18.00%  
PIK Rate [5]   18.00%  
Principal [5]   $ 4,173  
Cost [5]   3,963  
Fair value [5]   $ 4,110  
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [8] 18.00%    
Principal [8] $ 114    
Cost [8] 112    
Fair value [8] $ 110    
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate [8] 18.00%    
PIK Rate [8] 18.00%    
Principal [8] $ 4,367    
Cost [8] 4,178    
Fair value [8] $ 4,214    
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants      
Schedule of Investments [Line Items]      
Units (in shares) 197,717 [8],[24] 197,717 [5],[25]  
Cost $ 0 [8],[24] $ 0 [5],[25]  
Fair value $ 0 [8],[24] $ 0 [5],[25]  
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [6],[26] 13.00%    
Reference Rate and Spread 5.00% [6],[26] 6.00% [7],[15]  
Principal $ 43 [6],[26] $ 0 [7],[15]  
Cost 39 [6],[26] (5) [7],[15]  
Fair value $ 43 [6],[26] $ (5) [7],[15]  
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.80% [6],[26],[27],[28] 10.20% [7],[15]  
Reference Rate and Spread 6.00% [6],[26],[27],[28] 6.00% [7],[15]  
Principal $ 259 [6],[26],[27],[28] $ 86 [7],[15]  
Cost 251 [6],[26],[27],[28] 77 [7],[15]  
Fair value $ 258 [6],[26],[27],[28] $ 86 [7],[15]  
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.79% [6],[26],[27] 10.58% [7],[15]  
Reference Rate and Spread 6.00% [6],[26],[27] 6.00% [7],[15]  
Principal $ 2,063 [6],[26],[27] $ 1,983 [7],[15]  
Cost 2,011 [6],[26],[27] 1,930 [7],[15]  
Fair value $ 2,063 [6],[26],[27] $ 1,983 [7],[15]  
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.59% [8],[26] 10.14% [5],[15]  
Reference Rate and Spread 5.75% [8],[26] 5.75% [5],[15]  
Principal $ 9,000 [8],[26] $ 9,125 [5],[15]  
Cost 8,883 [8],[26] 8,996 [5],[15]  
Fair value $ 8,370 [8],[26] $ 8,213 [5],[15]  
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 46 [29] 46 [30]  
Cost $ 300 [29] $ 300 [30]  
Fair value $ 2,350 [29] $ 2,350 [30]  
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     10.00%
Investment, Identifier [Axis]: AMEREQUIP LLC., Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 11 [6],[29] 11 [7]  
Cost $ 83 [6],[29] $ 80 [7]  
Fair value $ 90 [6],[29] $ 80 [7]  
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 7.40% [6],[26],[27],[31] 7.40% [7],[15]  
Principal $ 0 [6],[26],[27],[31] $ 0 [7],[15]  
Cost 0 [6],[26],[27],[31] 0 [7],[15]  
Fair value $ 0 [6],[26],[27],[31] $ 0 [7],[15]  
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.10% [6],[26],[27] 11.72% [7],[15]  
Reference Rate and Spread 7.40% [6],[26],[27] 7.40% [7],[15]  
Principal $ 2,021 [6],[26],[27] $ 2,026 [7],[15]  
Cost 2,021 [6],[26],[27] 2,026 [7],[15]  
Fair value $ 2,021 [6],[26],[27] $ 2,025 [7],[15]  
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units 1      
Schedule of Investments [Line Items]      
Total Rate 14.13%    
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     12.00%
Reference Rate and Spread     10.00%
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 10.00%    
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.75%    
Reference Rate and Spread 10.00%    
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 100,000 [6] 100,000 [7]  
Cost $ 100 [6] $ 100 [7]  
Fair value $ 90 [6] $ 90 [7]  
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [6],[26],[27] 11.39%    
Reference Rate and Spread 6.50% [6],[26],[27] 5.50% [7],[15]  
Principal $ 50 [6],[26],[27] $ 0 [7],[15]  
Cost 50 [6],[26],[27] 0 [7],[15]  
Fair value $ 50 [6],[26],[27] $ 0 [7],[15]  
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.09% [6],[26],[27] 9.32% [7],[15]  
Reference Rate and Spread 5.50% [6],[26],[27] 5.50% [7],[15]  
Principal $ 925 [6],[26],[27] $ 925 [7],[15]  
Cost 908 [6],[26],[27] 907 [7],[15]  
Fair value $ 914 [6],[26],[27] $ 914 [7],[15]  
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.09% [6],[26],[27] 11.32% [7],[15]  
Reference Rate and Spread 7.50% [6],[26],[27] 7.50% [7],[15]  
Principal $ 925 [6],[26],[27] $ 925 [7],[15]  
Cost 908 [6],[26],[27] 907 [7],[15]  
Fair value $ 916 [6],[26],[27] $ 916 [7],[15]  
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) [5]   585  
Cost [5]   $ 0  
Fair value [5]   $ 3,290  
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.23% [5],[15] 8.50%
Reference Rate and Spread 7.50% 7.50% [5],[15] 7.50%
Principal [5],[15]   $ 6,811  
Cost [5],[15]   6,266  
Fair value [5],[15]   $ 6,368  
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt      
Schedule of Investments [Line Items]      
Total Rate   10.00% [5] 10.00%
PIK Rate 10.00% 10.00% [5] 10.00%
Principal [5]   $ 3,417  
Cost [5]   2,337  
Fair value [5]   $ 2,614  
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity      
Schedule of Investments [Line Items]      
Units (in shares) 137 [6] 50 [7]  
Cost $ 134 [6] $ 50 [7]  
Fair value $ 140 [6] $ 56 [7]  
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [6],[26],[27] 12.52%    
Reference Rate and Spread 7.75% [6],[26],[27] 7.25% [7],[15]  
Principal $ 307 [6],[26],[27] $ 0 [7],[15]  
Cost 287 [6],[26],[27] (8) [7],[15]  
Fair value $ 294 [6],[26],[27] $ (8) [7],[15]  
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.61% [6],[26],[27] 12.17% [7],[15]  
Reference Rate and Spread 7.75% [6],[26],[27] 7.25% [7],[15]  
Principal $ 4,028 [6],[26],[27] $ 4,038 [7],[15]  
Cost 3,874 [6],[26],[27] 3,876 [7],[15]  
Fair value $ 3,862 [6],[26],[27] $ 3,876 [7],[15]  
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 14.13% [6] 13.88% [7],[15]  
Reference Rate and Spread 9.50% [6] 9.50% [7],[15]  
Principal $ 4,616 [6] $ 4,616 [7],[15]  
Cost 4,517 [6] 4,511 [7],[15]  
Fair value $ 4,616 [6] $ 4,616 [7],[15]  
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.13% [6] 13.57% [7],[15]  
Reference Rate and Spread 9.50% [6] 9.00% [7],[15]  
Principal $ 230 [6] $ 1,379 [7],[15]  
Cost 224 [6] 1,348 [7],[15]  
Fair value $ 230 [6] $ 1,379 [7],[15]  
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [6] 14.13%    
Reference Rate and Spread [6] 9.50%    
Principal [6] $ 1,379    
Cost [6] 1,350    
Fair value [6] $ 1,379    
Investment, Identifier [Axis]: Acumera, Inc., Warrants      
Schedule of Investments [Line Items]      
Units (in shares) [6] 6,703    
Cost [6] $ 0    
Fair value [6] $ 0    
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.00% [6],[26],[32] 10.00% [7],[15],[33]  
Reference Rate and Spread 6.50% [6],[26],[32] 6.00% [7],[15],[33]  
Principal $ 894 [6],[26],[32] $ 565 [7],[15],[33]  
Cost 894 [6],[26],[32] 565 [7],[15],[33]  
Fair value $ 857 [6],[26],[32] $ 565 [7],[15],[33]  
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.00% [6],[26],[34] 10.00% [7],[15],[33]  
Reference Rate and Spread 7.50% [6],[26],[34] 7.50% [7],[15],[33]  
Principal $ 2,749 [6],[26],[34] $ 2,826 [7],[15],[33]  
Cost 2,743 [6],[26],[34] 2,819 [7],[15],[33]  
Fair value $ 2,749 [6],[26],[34] $ 2,826 [7],[15],[33]  
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 6.00% [6],[26],[31] 6.00% [7],[15]  
Principal $ 0 [6],[26],[31] $ 0 [7],[15]  
Cost (12) [6],[26],[31] (13) [7],[15]  
Fair value $ (12) [6],[26],[31] $ (13) [7],[15]  
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.12% [6],[26] 11.12% [7],[15]  
Reference Rate and Spread 6.00% [6],[26] 6.00% [7],[15]  
Principal $ 8,250 [6],[26] $ 8,271 [7],[15]  
Cost 8,190 [6],[26] 8,206 [7],[15]  
Fair value $ 8,250 [6],[26] $ 8,271 [7],[15]  
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.49% [6],[26],[27] 10.46% [7],[15]  
Reference Rate and Spread 6.75% [6],[26],[27] 6.75% [7],[15]  
PIK Rate [6],[26],[27] 1.00%    
Principal $ 4,228 [6],[26],[27] $ 4,438 [7],[15]  
Cost 4,199 [6],[26],[27] 4,416 [7],[15]  
Fair value $ 3,624 [6],[26],[27] $ 4,148 [7],[15]  
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.49% [6],[26],[27] 12.46% [7],[15]  
Reference Rate and Spread 8.75% [6],[26],[27] 8.75% [7],[15]  
PIK Rate [6],[26],[27] 1.00%    
Principal $ 4,228 [6],[26],[27] $ 4,438 [7],[15]  
Cost 4,199 [6],[26],[27] 4,417 [7],[15]  
Fair value $ 3,614 [6],[26],[27] $ 4,161 [7],[15]  
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 7.50% [8],[35] 7.50% [5],[36]  
Reference Rate and Spread 6.50% [8],[35] 6.50% [5],[36]  
Principal $ 2,425 [8],[35] $ 2,425 [5],[36]  
Cost 2,375 [8],[35] 2,375 [5],[36]  
Fair value $ 124 [8],[35] $ 136 [5],[36]  
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 7.50% [8],[26],[35] 7.50% [5],[15],[36]  
Reference Rate and Spread 6.50% [8],[26],[35] 6.50% [5],[15],[36]  
Principal $ 11,693 [8],[26],[35] $ 11,693 [5],[15],[36]  
Cost 11,451 [8],[26],[35] 11,451 [5],[15],[36]  
Fair value $ 599 [8],[26],[35] $ 658 [5],[15],[36]  
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1      
Schedule of Investments [Line Items]      
Units (in shares) 800 800  
Total Rate 14.13% 14.13%  
Cost $ 800 $ 800  
Fair value $ 0 $ 0  
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2      
Schedule of Investments [Line Items]      
Units (in shares) 607 607  
Cost $ 607 $ 607  
Fair value $ 900 $ 880  
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 10.00% [26],[31] 10.00% [15]  
Principal $ 0 [26],[31] $ 0 [15]  
Cost (2) [26],[31] (2) [15]  
Fair value $ (2) [26],[31] $ (2) [15]  
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.75% [26] 14.13% [15]  
Reference Rate and Spread 10.00% [26] 10.00% [15]  
Principal $ 1,149 [26] $ 1,166 [15]  
Cost 1,122 [26] 1,135 [15]  
Fair value $ 1,122 [26] $ 1,135 [15]  
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants      
Schedule of Investments [Line Items]      
Units (in shares) 105 [24] 105 [25]  
Cost $ 79 [24] $ 79 [25]  
Fair value $ 0 [24] $ 0 [25]  
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity      
Schedule of Investments [Line Items]      
Units (in shares) 124 [6] 124 [7]  
Cost $ 124 [6] $ 124 [7]  
Fair value $ 0 [6] $ 0 [7]  
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 14.83% [6],[26],[27] 13.41% [7],[15]  
Reference Rate and Spread 7.00% [6],[26],[27] 9.00% [7],[15]  
PIK Rate [6],[26],[27] 3.00%    
Principal $ 2,484 [6],[26],[27] $ 2,484 [7],[15]  
Cost 2,431 [6],[26],[27] 2,427 [7],[15]  
Fair value $ 2,001 [6],[26],[27] $ 2,095 [7],[15]  
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.83% [6],[26],[27] 13.56% [7],[15]  
Reference Rate and Spread 7.00% [6],[26],[27] 9.00% [7],[15]  
PIK Rate [6],[26],[27] 3.00%    
Principal $ 15,665 [6],[26],[27] $ 15,786 [7],[15]  
Cost 15,436 [6],[26],[27] 15,540 [7],[15]  
Fair value $ 12,617 [6],[26],[27] $ 13,313 [7],[15]  
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 62,402 [6] 62,402 [7]  
Cost $ 62 [6] $ 62 [7]  
Fair value $ 80 [6] $ 62 [7]  
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 6.00% [6],[26],[27],[31] 6.50% [7],[15]  
Principal $ 0 [6],[26],[27],[31] $ 0 [7],[15]  
Cost (4) [6],[26],[27],[31] (4) [7],[15]  
Fair value $ (4) [6],[26],[27],[31] $ (4) [7],[15]  
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.72% [6],[26],[27] 10.92% [7],[15]  
Reference Rate and Spread 6.00% [6],[26],[27] 6.50% [7],[15]  
Principal $ 2,200 [6],[26],[27] $ 2,205 [7],[15]  
Cost 2,161 [6],[26],[27] 2,165 [7],[15]  
Fair value $ 2,145 [6],[26],[27] $ 2,170 [7],[15]  
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 200,000 200,000  
Cost $ 200 $ 200  
Fair value $ 0 $ 0  
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)      
Schedule of Investments [Line Items]      
Total Rate 15.00% 15.00%  
Cost $ 41 $ 41  
Fair value $ 0 $ 0  
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 15.66% [26],[37] 15.12% [15],[38]  
Reference Rate and Spread 11.00% [26],[37] 11.00% [15],[38]  
Principal $ 200 [26],[37] $ 200 [15],[38]  
Cost 200 [26],[37] 200 [15],[38]  
Fair value $ 200 [26],[37] $ 200 [15],[38]  
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 15.66% [26],[37] 15.12% [15],[38]  
Reference Rate and Spread 11.00% [26],[37] 11.00% [15],[38]  
Principal $ 1,000 [26],[37] $ 1,000 [15],[38]  
Cost 1,000 [26],[37] 1,000 [15],[38]  
Fair value $ 522 [26],[37] $ 522 [15],[38]  
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 12 [6] 12 [7]  
Cost $ 528 [6] $ 528 [7]  
Fair value $ 1,013 [6] $ 1,107 [7]  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock      
Schedule of Investments [Line Items]      
Units (in shares) 453 [29] 453 [30]  
Cost $ 455 [29] $ 455 [30]  
Fair value 680 [29] 455 [30]  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     11.00%
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Principal 0 [31] 0  
Cost (1) [31] (1)  
Fair value $ (1) [31] $ (1)  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.00% 11.00%  
Principal $ 1,175 $ 1,225  
Cost 1,157 1,205  
Fair value $ 1,157 $ 1,205  
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1      
Schedule of Investments [Line Items]      
Units (in shares) 1,548,387 [6],[29],[39] 1,548,387 [7],[30],[40]  
Total Rate 8.00% [6],[29],[39] 8.00% [7],[30],[40]  
PIK Rate 8.00% [6],[29],[39] 8.00% [7],[30],[40]  
Cost $ 1,184 [6],[29],[39] $ 1,161 [7],[30],[40]  
Fair value $ 5,544 [6],[29],[39] $ 4,561 [7],[30],[40]  
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2      
Schedule of Investments [Line Items]      
Units (in shares) 122,416 [6],[29],[31],[39] 122,416 [7],[30],[40]  
PIK Rate 16.00% [6],[29],[31],[39] 16.00% [7],[30],[40]  
Cost $ 0 [6],[29],[31],[39] $ 0 [7],[30],[40]  
Fair value $ 340 [6],[29],[31],[39] $ 270 [7],[30],[40]  
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.00% [6] 12.00% [7]  
PIK Rate 1.50% [6] 1.50% [7]  
Principal $ 197 [6] $ 190 [7]  
Cost 197 [6] 189 [7]  
Fair value $ 197 [6] $ 190 [7]  
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 7.00% [6],[26],[27],[31] 1.00% [7],[15]  
PIK Rate 6.00% [6],[26],[27],[31] 6.00% [7],[15]  
Principal $ 0 [6],[26],[27],[31] $ 0 [7],[15]  
Cost (21) [6],[26],[27],[31] (22) [7],[15]  
Fair value $ (21) [6],[26],[27],[31] $ (22) [7],[15]  
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.89% [6],[26],[27] 11.40% [7],[15]  
Reference Rate and Spread 7.00% [6],[26],[27] 1.00% [7],[15]  
PIK Rate 6.00% [6],[26],[27] 6.00% [7],[15]  
Principal $ 8,111 [6],[26],[27] $ 7,991 [7],[15]  
Cost 7,975 [6],[26],[27] 7,848 [7],[15]  
Fair value $ 8,111 [6],[26],[27] $ 7,991 [7],[15]  
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 1,050,000 [6] 1,050,000 [7]  
Cost $ 1,050 [6] $ 1,050 [7]  
Fair value $ 230 [6] $ 420 [7]  
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 700,446 [8],[29] 700,446 [5],[30]  
Cost $ 0 [8],[29] $ 0 [5],[30]  
Fair value $ 2,974 [8],[29] $ 4,708 [5],[30]  
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [8],[26] 15.50%    
Reference Rate and Spread 7.50% [8],[26] 8.50% [5],[15]  
PIK Rate [8],[26] 14.50%    
Principal $ 1,299 [8],[26] $ 0 [5],[15]  
Cost 1,299 [8],[26] 0 [5],[15]  
Fair value $ 1,221 [8],[26] $ 0 [5],[15]  
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.07% [8],[26] 12.94% [5],[15]  
Reference Rate and Spread 8.50% [8],[26] 8.50% [5],[15]  
PIK Rate [8],[26] 12.07%    
Principal $ 3,549 [8],[26] $ 3,473 [5],[15]  
Cost 2,626 [8],[26] 2,455 [5],[15]  
Fair value $ 3,336 [8],[26] $ 3,366 [5],[15]  
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants      
Schedule of Investments [Line Items]      
Units (in shares) 175,110 [8],[24] 175,110 [5],[25]  
Cost $ 1,111 [8],[24] $ 1,111 [5],[25]  
Fair value $ 739 [8],[24] $ 1,173 [5],[25]  
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 540,000 540,000 [30]  
Cost $ 564 $ 564 [30]  
Fair value $ 692 $ 741 [30]  
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.00% 10.00%  
Principal $ 80 $ 80  
Cost 80 80  
Fair value $ 80 $ 80  
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 737 [29] 737 [30]  
Cost $ 1,070 [29] $ 1,070 [30]  
Fair value $ 1,640 [29] $ 1,770 [30]  
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 14.66% [26] 14.12% [15] 11.00%
Reference Rate and Spread 10.00% [26] 10.00% [15] 10.00%
Principal $ 1,460 [26] $ 1,491 [15]  
Cost 1,460 [26] 1,491 [15]  
Fair value $ 1,460 [26] $ 1,491 [15]  
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)      
Schedule of Investments [Line Items]      
Units (percentage) 0.50% [9],[10],[41] 0.50% [11],[12],[30],[42]  
Cost $ 2,449 [9],[10],[41] $ 2,449 [11],[12],[30],[42]  
Fair value $ 1,529 [9],[10],[41] $ 1,576 [11],[12],[30],[42]  
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)      
Schedule of Investments [Line Items]      
Units (percentage) 1.20% [9],[10],[29],[41] 1.20% [11],[12],[30],[42]  
Cost $ 8,737 [9],[10],[29],[41] $ 8,737 [11],[12],[30],[42]  
Fair value $ 9,328 [9],[10],[29],[41] $ 9,082 [11],[12],[30],[42]  
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 4 4  
Total Rate 6.00% 6.00%  
PIK Rate 6.00% 6.00%  
Cost $ 3,040 $ 3,040  
Fair value $ 0 $ 0  
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.00% 9.00%  
Principal $ 11,490 $ 11,740  
Cost 11,490 11,740  
Fair value $ 8,095 $ 8,345  
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [6],[26] 9.83%    
Reference Rate and Spread 5.00% [6],[26] 5.00% [7],[15]  
Principal $ 516 [6],[26] $ 0 [7],[15]  
Cost 499 [6],[26] (19) [7],[15]  
Fair value $ 516 [6],[26] $ 0 [7],[15]  
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 9.63% [6],[26] 8.91% [7],[15]  
Reference Rate and Spread 5.00% [6],[26] 5.00% [7],[15]  
Principal $ 13,222 [6],[26] $ 13,255 [7],[15]  
Cost 13,045 [6],[26] 13,070 [7],[15]  
Fair value $ 13,222 [6],[26] $ 13,255 [7],[15]  
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1      
Schedule of Investments [Line Items]      
Units (in shares) 379,338 379,338 [30]  
Cost $ 379 $ 379 [30]  
Fair value $ 379 $ 379 [30]  
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2      
Schedule of Investments [Line Items]      
Units (in shares) 126,446 126,446  
Cost $ 0 $ 0  
Fair value $ 0 $ 0  
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate [7],[15],[43]   11.99%  
Reference Rate and Spread [7],[15],[43]   8.50%  
PIK Rate [7],[15],[43]   0.01%  
Principal [7],[15],[43]   $ 20,112  
Cost [7],[15],[43]   20,066  
Fair value [7],[15],[43]   $ 20,112  
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [6],[26] 13.14%    
Reference Rate and Spread [6],[26] 6.50%    
PIK Rate [6],[26] 2.00%    
Principal [6],[26] $ 14,372    
Cost [6],[26] 14,350    
Fair value [6],[26] $ 14,372    
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate [6],[26] 13.14%    
Reference Rate and Spread [6],[26] 6.50%    
PIK Rate [6],[26] 2.00%    
Principal [6],[26] $ 4,464    
Cost [6],[26] 4,457    
Fair value [6],[26] $ 4,464    
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [6],[26] 13.33%    
Reference Rate and Spread [6],[26] 6.50%    
PIK Rate [6],[26] 2.00%    
Principal [6],[26] $ 0    
Cost [6],[26] 0    
Fair value [6],[26] $ 0    
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4      
Schedule of Investments [Line Items]      
Total Rate [6],[26] 13.23%    
Reference Rate and Spread [6],[26] 6.50%    
PIK Rate [6],[26] 2.00%    
Principal [6],[26] $ 0    
Cost [6],[26] 0    
Fair value [6],[26] $ 0    
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 5      
Schedule of Investments [Line Items]      
Total Rate [6],[26] 13.33%    
Reference Rate and Spread [6],[26] 6.50%    
PIK Rate [6],[26] 2.00%    
Principal [6],[26] $ 1,774    
Cost [6],[26] 1,771    
Fair value [6],[26] $ 1,774    
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 11.34% [8],[26],[27] 10.88% [5],[15]  
Reference Rate and Spread 6.50% [8],[26],[27] 6.50% [5],[15]  
Principal $ 7,589 [8],[26],[27] $ 7,609 [5],[15]  
Cost 7,537 [8],[26],[27] 7,553 [5],[15]  
Fair value $ 7,323 [8],[26],[27] $ 7,342 [5],[15]  
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 50,000 50,000  
Cost $ 500 $ 500  
Fair value $ 500 $ 500  
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 6.00% [26],[31] 6.00% [15]  
Principal $ 0 [26],[31] $ 0 [15]  
Cost (3) [26],[31] (3) [15]  
Fair value $ (3) [26],[31] $ (3) [15]  
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.50% 12.50%  
Principal $ 2,250 $ 2,250  
Cost 2,200 2,196  
Fair value $ 2,200 $ 2,196  
Investment, Identifier [Axis]: CaseWorthy, Inc., Common Equity      
Schedule of Investments [Line Items]      
Units (in shares) 80,000 [6] 80,000 [7]  
Cost $ 80 [6] $ 80 [7]  
Fair value $ 80 [6] $ 80 [7]  
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 6.00% [6],[26],[31] 6.00% [7],[15]  
Principal $ 0 [6],[26],[31] $ 0 [7],[15]  
Cost (3) [6],[26],[31] (4) [7],[15]  
Fair value $ (3) [6],[26],[31] $ (4) [7],[15]  
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.73% [6],[26] 10.73% [7],[15]  
Reference Rate and Spread 6.00% [6],[26] 6.00% [7],[15]  
Principal $ 2,600 [6],[26] $ 2,600 [7],[15]  
Cost 2,575 [6],[26] 2,574 [7],[15]  
Fair value $ 2,576 [6],[26] $ 2,574 [7],[15]  
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.73% [6],[26] 10.48% [7],[15]  
Reference Rate and Spread 6.00% [6],[26] 5.75% [7],[15]  
Principal $ 1,995 [6],[26] $ 1,995 [7],[15]  
Cost 1,978 [6],[26] 1,977 [7],[15]  
Fair value $ 1,995 [6],[26] $ 1,995 [7],[15]  
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 3,327 3,327  
Cost $ 1,531 $ 1,531  
Fair value $ 2,320 $ 2,170  
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     12.00%
Reference Rate and Spread     10.00%
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 9.00% [26],[31] 9.00% [15]  
Principal $ 0 [26],[31] $ 0 [15]  
Cost 0 [26],[31] 0 [15]  
Fair value $ 0 [26],[31] $ 0 [15]  
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.75% [26] 13.13% [15]  
Reference Rate and Spread 9.00% [26] 9.00% [15]  
Principal $ 3,758 [26] $ 3,758 [15]  
Cost 3,733 [26] 3,731 [15]  
Fair value $ 3,733 [26] $ 3,731 [15]  
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1      
Schedule of Investments [Line Items]      
Units (in shares) 1,087 [29] 1,087 [30]  
Cost $ 2,860 [29] $ 2,860 [30]  
Fair value $ 5,700 [29] $ 5,728 [30]  
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2      
Schedule of Investments [Line Items]      
Units (in shares) 261,786 [29],[39] 261,786 [30],[40]  
Cost $ 443 [29],[39] $ 443 [30],[40]  
Fair value $ 708 [29],[39] $ 678 [30],[40]  
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     9.00%
Reference Rate and Spread     8.00%
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 6.00% [26],[27] 6.00% [15]  
Principal $ 0 [26],[27] $ 0 [15]  
Cost 0 [26],[27] 0 [15]  
Fair value $ 0 [26],[27] $ 0 [15]  
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.86% [26],[27] 12.13% [15]  
Reference Rate and Spread 8.00% [26],[27] 8.00% [15]  
Principal $ 4,236 [26],[27] $ 4,236 [15]  
Cost 4,233 [26],[27] 4,228 [15]  
Fair value $ 4,236 [26],[27] $ 4,236 [15]  
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.06% [6],[26],[27],[44] 10.72% [7],[15],[45]  
Reference Rate and Spread 6.25% [6],[26],[27],[44] 6.25% [7],[15],[45]  
Principal $ 172 [6],[26],[27],[44] $ 172 [7],[15],[45]  
Cost 163 [6],[26],[27],[44] 162 [7],[15],[45]  
Fair value $ 168 [6],[26],[27],[44] $ 169 [7],[15],[45]  
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.08% [6],[26],[27],[44] 10.71% [7],[15],[46]  
Reference Rate and Spread 6.25% [6],[26],[27],[44] 6.25% [7],[15],[46]  
Principal $ 3,574 [6],[26],[27],[44] $ 3,591 [7],[15],[46]  
Cost 3,517 [6],[26],[27],[44] 3,530 [7],[15],[46]  
Fair value $ 3,500 [6],[26],[27],[44] $ 3,539 [7],[15],[46]  
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [6],[26],[27] 11.14%    
Reference Rate and Spread [6],[26],[27] 6.25%    
Principal [6],[26],[27] $ 453    
Cost [6],[26],[27] 441    
Fair value [6],[26],[27] $ 444    
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 457 [29] 457  
Cost $ 491 [29] $ 491  
Fair value $ 3,390 [29] $ 3,330  
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt      
Schedule of Investments [Line Items]      
Total Rate     10.00%
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1      
Schedule of Investments [Line Items]      
Units (in shares) 179 [29] 179 [30]  
Cost $ 1,820 [29] $ 1,820 [30]  
Fair value $ 1,790 [29] $ 2,060 [30]  
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2      
Schedule of Investments [Line Items]      
Units (in shares) 200 [39] 200 [40]  
Cost $ 53 [39] $ 53 [40]  
Fair value $ 207 [39] $ 152 [40]  
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 13.79% [26],[27] 13.23% [15] 10.50%
Reference Rate and Spread 9.00% [26],[27] 9.00% [15] 9.50%
Principal $ 2,500 [26],[27] $ 2,620 [15]  
Cost 2,500 [26],[27] 2,620 [15]  
Fair value $ 2,500 [26],[27] $ 2,620 [15]  
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.00% 10.00% 10.00%
Principal $ 260 $ 262  
Cost 258 260  
Fair value $ 258 $ 260  
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2.1      
Schedule of Investments [Line Items]      
Total Rate 13.79%    
Reference Rate and Spread 9.00%    
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.00%    
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 15.00% [6],[35],[37] 15.00% [7],[36],[38]  
PIK Rate 15.00% [6],[35],[37] 15.00% [7],[36],[38]  
Principal $ 2,747 [6],[35],[37] $ 2,747 [7],[36],[38]  
Cost 2,402 [6],[35],[37] 2,403 [7],[36],[38]  
Fair value $ 26 [6],[35],[37] $ 19 [7],[36],[38]  
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 39 [29] 39 [30]  
Cost $ 1,440 [29] $ 1,440 [30]  
Fair value $ 6,430 [29] $ 6,160 [30]  
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.88% [26] 9.75% [15]  
Reference Rate and Spread 6.00% [26] 6.00% [15]  
Principal $ 1,140 [26] $ 1,140 [15]  
Cost 1,128 [26] 1,127 [15]  
Fair value $ 1,140 [26] $ 1,140 [15]  
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 8.00% 8.00%  
Principal $ 4,819 $ 4,819  
Cost 4,757 4,754  
Fair value $ 4,819 $ 4,819  
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 147 [29],[39] 147 [30],[40]  
Cost $ 2,079 [29],[39] $ 2,079 [30],[40]  
Fair value $ 14,790 [29],[39] $ 14,550 [30],[40]  
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     12.25%
Reference Rate and Spread     10.50%
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 15.50% [26] 15.38% [15]  
Reference Rate and Spread 10.50% [26] 10.50% [15]  
Principal $ 196 [26] $ 273 [15]  
Cost 184 [26] 261 [15]  
Fair value $ 196 [26] $ 273 [15]  
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 15.50% [26] 15.38% [15]  
Reference Rate and Spread 10.50% [26] 10.50% [15]  
Principal $ 6,806 [26] $ 6,882 [15]  
Cost 6,717 [26] 6,786 [15]  
Fair value $ 6,806 [26] $ 6,882 [15]  
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 4,320 4,320 [30]  
Cost $ 1,920 $ 1,920 [30]  
Fair value 2,050 2,290 [30]  
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     12.00%
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Principal 0 [31] 0  
Cost 0 [31] 0  
Fair value $ 0 [31] $ 0  
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00% 12.00%  
Principal $ 5,749 $ 5,828  
Cost 5,659 5,729  
Fair value $ 5,659 $ 5,729  
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.34% [6],[26],[47] 12.56% [7],[15],[48]  
Reference Rate and Spread 7.50% [6],[26],[47] 8.00% [7],[15],[48]  
Principal $ 4,167 [6],[26],[47] $ 4,167 [7],[15],[48]  
Cost 4,110 [6],[26],[47] 4,106 [7],[15],[48]  
Fair value $ 3,799 [6],[26],[47] $ 3,851 [7],[15],[48]  
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.35% [6],[26] 12.56% [7],[15]  
Reference Rate and Spread 7.50% [6],[26] 8.00% [7],[15]  
Principal $ 15,547 [6],[26] $ 15,604 [7],[15]  
Cost 15,334 [6],[26] 15,374 [7],[15]  
Fair value $ 14,176 [6],[26] $ 14,421 [7],[15]  
Investment, Identifier [Axis]: Construction Supply Investments, LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 861,618 [6] 861,618 [7],[30]  
Cost $ 3,335 [6] $ 3,335 [7],[30]  
Fair value $ 23,650 [6] $ 21,165 [7],[30]  
Investment, Identifier [Axis]: Copper Trail Fund Investments, LP Interests (CTMH, LP)      
Schedule of Investments [Line Items]      
Units (percentage) 38.80% [9],[10],[41] 39.00% [11],[12],[42]  
Cost $ 713 [9],[10],[41] $ 713 [11],[12],[42]  
Fair value $ 588 [9],[10],[41] $ 588 [11],[12],[42]  
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Units (in shares) 1,486 1,486  
Cost $ 1,486 $ 1,486  
Fair value $ 1,820 $ 1,820  
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.00% 12.00%  
Principal $ 5,300 $ 5,300  
Cost 5,222 5,217  
Fair value $ 5,300 $ 5,300  
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 776,316 [6] 776,316 [7]  
Total Rate 8.00% [6] 8.00% [7]  
PIK Rate 8.00% [6] 8.00% [7]  
Cost $ 776 [6] $ 776 [7]  
Fair value $ 380 [6] $ 380 [7]  
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)      
Schedule of Investments [Line Items]      
Total Rate 10.00% [6],[29] 10.00% [7],[30]  
PIK Rate 10.00% [6],[29] 10.00% [7],[30]  
Cost $ 1,190 [6],[29] $ 1,161 [7],[30]  
Fair value $ 1,190 [6],[29] $ 1,161 [7],[30]  
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 7.50% [6],[26],[31] 7.50% [7],[15]  
Principal $ 0 [6],[26],[31] $ 0 [7],[15]  
Cost 0 [6],[26],[31] (1) [7],[15]  
Fair value $ 0 [6],[26],[31] $ (1) [7],[15]  
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.44% [6],[26] 12.24% [7],[15]  
Reference Rate and Spread 7.50% [6],[26] 7.50% [7],[15]  
Principal $ 5,634 [6],[26] $ 6,119 [7],[15]  
Cost 5,632 [6],[26] 6,110 [7],[15]  
Fair value $ 5,634 [6],[26] $ 5,978 [7],[15]  
Investment, Identifier [Axis]: Dalton US Inc., Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 14 [6] 14 [7]  
Cost $ 14 [6] $ 14 [7]  
Fair value $ 14 [6] $ 14 [7]  
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.33% [6],[26],[27],[49] 11.90% [7],[15]  
Reference Rate and Spread 7.50% [6],[26],[27],[49] 8.00% [7],[15]  
Principal $ 232 [6],[26],[27],[49] $ 79 [7],[15]  
Cost 216 [6],[26],[27],[49] 63 [7],[15]  
Fair value $ 226 [6],[26],[27],[49] $ 78 [7],[15]  
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Reference Rate and Spread 7.50% [6],[26],[27],[31] 8.00% [7],[15]  
Principal $ 0 [6],[26],[27],[31] $ 0 [7],[15]  
Cost (5) [6],[26],[27],[31] (5) [7],[15]  
Fair value $ (5) [6],[26],[27],[31] $ (5) [7],[15]  
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.26% [6],[26],[27] 12.56% [7],[15]  
Reference Rate and Spread 7.50% [6],[26],[27] 8.00% [7],[15]  
Principal $ 1,032 [6],[26],[27] $ 1,035 [7],[15]  
Cost 1,014 [6],[26],[27] 1,016 [7],[15]  
Fair value $ 1,006 [6],[26],[27] $ 1,020 [7],[15]  
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 1,000 [29] 1,000 [30]  
Cost $ 290 [29] $ 290 [30]  
Fair value $ 300 [29] $ 300 [30]  
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     7.50%
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 7.50% 7.50%  
Principal $ 50 $ 25  
Cost 50 25  
Fair value $ 50 $ 25  
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.00% 7.50%  
Principal $ 951 $ 958  
Cost 893 895  
Fair value $ 864 $ 865  
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 964 [29] 964 [30]  
Cost $ 2,375 [29] $ 2,375 [30]  
Fair value $ 2,459 [29] $ 2,459 [30]  
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 14.75% [26] 14.13% [15] 11.00%
Reference Rate and Spread 10.00% [26] 10.00% [15] 10.00%
Principal $ 3,801 [26] $ 3,883 [15]  
Cost 3,801 [26] 3,878 [15]  
Fair value $ 3,801 [26] $ 3,878 [15]  
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock      
Schedule of Investments [Line Items]      
Units (in shares) 2,100 [29] 2,100 [30]  
Cost $ 2,100 [29] $ 2,100 [30]  
Fair value 5,430 [29] $ 5,558 [30]  
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     12.00%
Reference Rate and Spread     11.00%
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread [15]   11.00%  
Principal 0 [31] $ 0 [15]  
Cost (5) [31] (5) [15]  
Fair value $ 0 [31] $ 0 [15]  
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.00% 15.13% [15]  
Reference Rate and Spread [15]   11.00%  
Principal $ 5,272 $ 5,352 [15]  
Cost 5,231 5,306 [15]  
Fair value $ 5,272 $ 5,352 [15]  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common Equity      
Schedule of Investments [Line Items]      
Units (in shares) 1,250,000 [6] 1,250,000 [7]  
Cost $ 0 [6] $ 0 [7]  
Fair value $ 0 [6] $ 0 [7]  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 1      
Schedule of Investments [Line Items]      
Units (in shares) 125,000 [6] 125,000 [7]  
Cost $ 128 [6] $ 128 [7]  
Fair value $ 128 [6] $ 128 [7]  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 2      
Schedule of Investments [Line Items]      
Units (in shares) 2,376,241 [6] 2,376,241 [7]  
Cost $ 0 [6] $ 0 [7]  
Fair value $ 0 [6] $ 0 [7]  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 9.18% [6],[26],[27] 9.18% [7],[15]  
Reference Rate and Spread 4.50% [6],[26],[27] 4.50% [7],[15]  
PIK Rate 9.18% [6],[26],[27] 9.18% [7],[15]  
Principal $ 1,875 [6],[26],[27] $ 1,875 [7],[15]  
Cost 1,717 [6],[26],[27] 1,717 [7],[15]  
Fair value $ 1,717 [6],[26],[27] $ 1,717 [7],[15]  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.18% [6],[26],[27] 11.18% [7],[15]  
Reference Rate and Spread 6.50% [6],[26],[27] 6.50% [7],[15]  
PIK Rate 11.18% [6],[26],[27] 11.18% [7],[15]  
Principal $ 1,875 [6],[26],[27] $ 1,875 [7],[15]  
Cost 1,642 [6],[26],[27] 1,642 [7],[15]  
Fair value $ 1,642 [6],[26],[27] $ 1,642 [7],[15]  
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.96% [8],[26] 10.70% [5],[15]  
Reference Rate and Spread 6.00% [8],[26] 6.00% [5],[15]  
Principal $ 6,805 [8],[26] $ 6,840 [5],[15]  
Cost 6,746 [8],[26] 6,777 [5],[15]  
Fair value $ 5,963 [8],[26] $ 6,156 [5],[15]  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1      
Schedule of Investments [Line Items]      
Units (in shares) 25 25  
Cost $ 497 $ 497  
Fair value $ 497 $ 497  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2      
Schedule of Investments [Line Items]      
Units (in shares) 61 [39] 61 [40]  
Cost $ 102 [39] $ 102 [40]  
Fair value $ 102 [39] $ 102 [40]  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 6.00% [26],[27],[31] 6.00% [15]  
Principal $ 0 [26],[27],[31] $ 0 [15]  
Cost (1) [26],[27],[31] (1) [15]  
Fair value $ (1) [26],[27],[31] $ (1) [15]  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00% 12.00%  
Principal $ 1,227 $ 1,227  
Cost 1,194 1,192  
Fair value $ 1,194 $ 1,192  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 9.00% 9.00%  
Principal $ 415 $ 415  
Cost 411 411  
Fair value $ 411 $ 411  
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.97% [8],[26],[27] 10.67% [5],[15]  
Reference Rate and Spread 6.25% [8],[26],[27] 6.25% [5],[15]  
Principal $ 2,438 [8],[26],[27] $ 2,453 [5],[15]  
Cost 2,397 [8],[26],[27] 2,411 [5],[15]  
Fair value $ 2,316 [8],[26],[27] $ 2,328 [5],[15]  
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.43% [6],[26],[27] 11.68% [7],[15]  
Reference Rate and Spread 6.50% [6],[26],[27] 6.50% [7],[15]  
Principal $ 310 [6],[26],[27] $ 41 [7],[15]  
Cost 297 [6],[26],[27] 27 [7],[15]  
Fair value $ 308 [6],[26],[27] $ 41 [7],[15]  
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.43% [6],[26],[27] 10.92% [7],[15]  
Reference Rate and Spread 6.50% [6],[26],[27] 6.50% [7],[15]  
Principal $ 5,147 [6],[26],[27] $ 5,159 [7],[15]  
Cost 5,062 [6],[26],[27] 5,070 [7],[15]  
Fair value $ 5,109 [6],[26],[27] $ 5,159 [7],[15]  
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.73% [6],[26],[27],[39] 10.67% [7],[15],[40]  
Reference Rate and Spread 7.00% [6],[26],[27],[39] 7.00% [7],[15],[40]  
Principal $ 308 [6],[26],[27],[39] $ 308 [7],[15],[40]  
Cost 305 [6],[26],[27],[39] 305 [7],[15],[40]  
Fair value $ 292 [6],[26],[27],[39] $ 292 [7],[15],[40]  
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.73% [6],[26],[27],[39] 10.67% [7],[15],[40]  
Reference Rate and Spread 7.00% [6],[26],[27],[39] 7.00% [7],[15],[40]  
Principal $ 3,692 [6],[26],[27],[39] $ 3,692 [7],[15],[40]  
Cost 3,665 [6],[26],[27],[39] 3,663 [7],[15],[40]  
Fair value 3,504 [6],[26],[27],[39] $ 3,507 [7],[15],[40]  
Investment, Identifier [Axis]: First American Treasury Obligations Fund Class Z      
Schedule of Investments [Line Items]      
Cost 10,910    
Fair value $ 10,910    
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Units (in shares) 2,340 [29] 2,340 [30]  
Cost $ 2,600 [29] $ 2,600 [30]  
Fair value $ 5,300 [29] $ 4,400 [30]  
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.25% [26] 10.75% [15] 12.00%
Reference Rate and Spread 6.50% [26] 6.50% [15] 11.00%
Principal $ 1,900 [26] $ 1,900 [15]  
Cost 1,886 [26] 1,885 [15]  
Fair value $ 1,900 [26] $ 1,900 [15]  
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.75% [26] 13.25% [15] 7.50%
Reference Rate and Spread 9.00% [26] 9.00% [15] 6.50%
Principal $ 5,300 [26] $ 5,300 [15]  
Cost 5,185 [26] 5,175 [15]  
Fair value $ 5,300 [26] $ 5,300 [15]  
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.55% [6],[26],[27] 11.21% [7],[15]  
Reference Rate and Spread 7.50% [6],[26],[27] 7.50% [7],[15]  
Principal $ 1,091 [6],[26],[27] $ 818 [7],[15]  
Cost 1,091 [6],[26],[27] 818 [7],[15]  
Fair value $ 1,091 [6],[26],[27] $ 818 [7],[15]  
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.55% [6],[26],[27] 12.19% [7],[15]  
Reference Rate and Spread 7.50% [6],[26],[27] 7.50% [7],[15]  
Principal $ 12,327 [6],[26],[27] $ 12,327 [7],[15]  
Cost 12,078 [6],[26],[27] 12,055 [7],[15]  
Fair value $ 12,327 [6],[26],[27] $ 12,327 [7],[15]  
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)      
Schedule of Investments [Line Items]      
Units (percentage) 6.00% [9],[10],[29],[41] 6.00% [11],[12],[30],[42]  
Cost $ 5,767 [9],[10],[29],[41] $ 6,303 [11],[12],[30],[42]  
Fair value $ 5,312 [9],[10],[29],[41] $ 5,848 [11],[12],[30],[42]  
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 56 [29] 56 [30]  
Cost $ 1,225 [29] $ 1,225 [30]  
Fair value $ 1,900 [29] $ 1,790 [30]  
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 9.00% 9.00% 12.00%
Principal $ 2,836 $ 2,836  
Cost 2,783 2,779  
Fair value $ 2,836 $ 2,836  
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 2,896 [29] 2,896 [30]  
Cost $ 6,435 [29] $ 6,435 [30]  
Fair value $ 21,890 [29] $ 21,890 [30]  
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     8.23%
Reference Rate and Spread     8.00%
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.66% 10.12%  
Reference Rate and Spread 6.00% 6.00%  
Principal $ 475 $ 330  
Cost 468 324  
Fair value $ 475 $ 330  
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.66% 12.12%  
Reference Rate and Spread 8.00% 8.00%  
Principal $ 19,944 $ 19,944  
Cost 19,766 19,753  
Fair value $ 19,944 $ 19,943  
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 2,261 [29] 2,261 [30]  
Cost $ 4,423 [29] $ 4,423 [30]  
Fair value $ 14,840 [29] $ 12,720 [30]  
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate     10.50%
Reference Rate and Spread     8.50%
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 8.50% [26],[27],[31],[50] 8.50% [15]  
Principal $ 0 [26],[27],[31],[50] $ 0 [15]  
Cost 0 [26],[27],[31],[50] 0 [15]  
Fair value $ 0 [26],[27],[31],[50] $ 0 [15]  
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.50% [26],[27],[50] 11.50% [15]  
Reference Rate and Spread 8.50% [26],[27],[50] 8.50% [15]  
Principal $ 15,820 [26],[27],[50] $ 16,020 [15]  
Cost 15,564 [26],[27],[50] 15,747 [15]  
Fair value $ 15,820 [26],[27],[50] $ 16,020 [15]  
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 920 920  
Cost $ 920 $ 920  
Fair value $ 0 $ 0  
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Units (in shares) 15,930 15,930  
Cost $ 1,400 $ 1,400  
Fair value $ 950 $ 950  
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate     10.50%
Reference Rate and Spread 9.50% [26],[31] 9.50% [15] 9.50%
PIK Rate     5.25%
Principal $ 0 [26],[31] $ 0 [15]  
Cost 0 [26],[31] 0 [15]  
Fair value $ 0 [26],[31] $ 0 [15]  
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.50% 12.50% 12.50%
PIK Rate     6.25%
Principal $ 600 $ 600  
Cost 600 600  
Fair value $ 571 $ 571  
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 14.34% [6],[26],[27] 14.34% [7],[15]  
Reference Rate and Spread 9.50% [6],[26],[27] 9.50% [7],[15]  
PIK Rate 14.34% [6],[26],[27] 2.00% [7],[15]  
Principal $ 187 [6],[26],[27] $ 180 [7],[15]  
Cost 186 [6],[26],[27] 179 [7],[15]  
Fair value $ 182 [6],[26],[27] $ 175 [7],[15]  
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.34% [6],[26],[27] 14.34% [7],[15]  
Reference Rate and Spread 9.50% [6],[26],[27] 9.50% [7],[15]  
PIK Rate 14.34% [6],[26],[27] 2.00% [7],[15]  
Principal $ 1,845 [6],[26],[27] $ 1,780 [7],[15]  
Cost 1,839 [6],[26],[27] 1,772 [7],[15]  
Fair value $ 1,798 [6],[26],[27] $ 1,731 [7],[15]  
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 6.50% [6],[26],[27],[31] 6.50% [7],[15]  
Principal $ 0 [6],[26],[27],[31] $ 0 [7],[15]  
Cost (17) [6],[26],[27],[31] (18) [7],[15]  
Fair value $ (17) [6],[26],[27],[31] $ (18) [7],[15]  
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Reference Rate and Spread 6.50% [6],[26],[27],[31] 6.50% [7],[15]  
Principal $ 0 [6],[26],[27],[31] $ 0 [7],[15]  
Cost (17) [6],[26],[27],[31] (18) [7],[15]  
Fair value $ (17) [6],[26],[27],[31] $ (18) [7],[15]  
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 11.12% [6],[26],[27] 10.62% [7],[15]  
Reference Rate and Spread 6.50% [6],[26],[27] 6.50% [7],[15]  
Principal $ 4,963 [6],[26],[27] $ 4,975 [7],[15]  
Cost 4,876 [6],[26],[27] 4,884 [7],[15]  
Fair value $ 4,963 [6],[26],[27] $ 4,975 [7],[15]  
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)      
Schedule of Investments [Line Items]      
Units (percentage) 49.30% [9],[10],[29],[41] 49.30% [11],[12],[42]  
Cost $ 4,027 [9],[10],[29],[41] $ 3,895 [11],[12],[42]  
Fair value $ 7,009 [9],[10],[29],[41] $ 7,552 [11],[12],[42]  
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)      
Schedule of Investments [Line Items]      
Units (percentage) 8.20% [9],[10],[41] 8.20% [11],[12],[42]  
Cost $ 2,050 [9],[10],[41] $ 2,558 [11],[12],[42]  
Fair value $ 3,936 [9],[10],[41] $ 4,331 [11],[12],[42]  
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 1      
Schedule of Investments [Line Items]      
Units (in shares) 56 [29] 56 [30]  
Cost $ 713 [29] $ 713 [30]  
Fair value $ 4,370 [29] $ 4,370 [30]  
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2      
Schedule of Investments [Line Items]      
Units (in shares) 56 [39] 56 [40]  
Cost $ 38 [39] $ 38 [40]  
Fair value $ 230 [39] $ 230 [40]  
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.75% [26] 10.13% [15]  
Reference Rate and Spread 6.00% [26] 6.00% [15]  
Principal $ 1,000 [26] $ 796 [15]  
Cost 998 [26] 796 [15]  
Fair value $ 1,000 [26] $ 796 [15]  
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.00% 9.00%  
Principal $ 8,200 $ 8,200  
Cost 8,151 8,147  
Fair value $ 8,200 $ 8,200  
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.10% [6],[26],[27] 12.07% [7]  
Reference Rate and Spread 8.25% [6],[26],[27] 8.25% [7]  
Principal $ 7,875 [6],[26],[27] $ 7,875 [7]  
Cost 7,770 [6],[26],[27] 7,762 [7]  
Fair value $ 6,468 [6],[26],[27] $ 6,826 [7]  
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [5],[15],[51]   10.17%  
Reference Rate and Spread 5.75% [8],[26],[27],[31] 5.75% [5],[15],[51]  
Principal $ 0 [8],[26],[27],[31] $ 465 [5],[15],[51]  
Cost (17) [8],[26],[27],[31] 447 [5],[15],[51]  
Fair value $ 0 [8],[26],[27],[31] $ 465 [5],[15],[51]  
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.59% [8],[26],[27] 10.17% [5],[15]  
Reference Rate and Spread 5.75% [8],[26],[27] 5.75% [5],[15]  
Principal $ 8,275 [8],[26],[27] $ 8,291 [5],[15]  
Cost 8,175 [8],[26],[27] 8,186 [5],[15]  
Fair value $ 8,187 [8],[26],[27] $ 8,291 [5],[15]  
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.48% [26],[52] 10.48% [5],[15]  
Reference Rate and Spread 5.75% [26],[52] 5.75% [5],[15]  
Principal $ 6,891 [26],[52] $ 6,984 [5],[15]  
Cost 6,741 [26],[52] 6,825 [5],[15]  
Fair value $ 5,937 [26],[52] $ 5,972 [5],[15]  
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.99% [6],[26],[27] 13.98% [7],[15]  
Reference Rate and Spread 7.75% [6],[26],[27] 7.75% [7],[15]  
PIK Rate 1.50% [6],[26],[27] 1.50% [7],[15]  
Principal $ 16,966 [6],[26],[27] $ 16,921 [7],[15]  
Cost 16,960 [6],[26],[27] 16,914 [7],[15]  
Fair value $ 15,438 [6],[26],[27] $ 15,961 [7],[15]  
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 1,191,667 [6] 1,191,667 [7]  
Cost $ 1,192 [6] $ 1,192 [7]  
Fair value $ 0 [6] $ 0 [7]  
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 1      
Schedule of Investments [Line Items]      
Total Rate 6.00% [6] 6.00% [7]  
PIK Rate 6.00% [6] 6.00% [7]  
Cost $ 2,470 [6] $ 2,470 [7]  
Fair value 0 [6] 0 [7]  
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 2      
Schedule of Investments [Line Items]      
Cost 0 [6] 0 [7]  
Fair value $ 0 [6] $ 0 [7]  
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 6.00% [6],[35] 6.00% [7],[36]  
PIK Rate 6.00% [6],[35] 6.00% [7],[36]  
Principal $ 10,902 [6],[35] $ 10,902 [7],[36]  
Cost 10,443 [6],[35] 10,443 [7],[36]  
Fair value $ 3,556 [6],[35] $ 4,515 [7],[36]  
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.95% [6] 14.42% [7]  
Reference Rate and Spread 10.00% [6] 10.00% [7]  
PIK Rate 14.95% [6] 14.42% [7]  
Principal $ 1,418 [6] $ 481 [7]  
Cost 1,385 [6] 459 [7]  
Fair value $ 1,373 [6] $ 459 [7]  
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [6] 14.66%    
Reference Rate and Spread [6] 10.00%    
PIK Rate [6] 14.66%    
Principal [6] $ 1,476    
Cost [6] 1,456    
Fair value [6] $ 1,430    
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Warrants      
Schedule of Investments [Line Items]      
Units (in shares) 185,757 [6] 185,757 [7]  
Cost $ 0 [6] $ 0 [7]  
Fair value $ 0 [6] $ 0 [7]  
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Member Units      
Schedule of Investments [Line Items]      
Units (in shares) 2,100 [6],[39] 2,100 [7],[40]  
Cost $ 2,100 [6],[39] $ 2,100 [7],[40]  
Fair value $ 1,400 [6],[39] $ 1,400 [7],[40]  
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1      
Schedule of Investments [Line Items]      
Units (in shares) 336 [6],[29],[39] 336 [7],[30],[40]  
Total Rate 10.00% [6],[29],[39] 10.00% [7],[30],[40]  
PIK Rate 10.00% [6],[29],[39] 10.00% [7],[30],[40]  
Cost $ 306 [6],[29],[39] $ 301 [7],[30],[40]  
Fair value $ 343 [6],[29],[39] $ 338 [7],[30],[40]  
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2      
Schedule of Investments [Line Items]      
Units (in shares) 187 [6],[29],[39] 187 [7],[30],[40]  
Total Rate 20.00% [6],[29],[39] 20.00% [7],[30],[40]  
PIK Rate 20.00% [6],[29],[39] 20.00% [7],[30],[40]  
Cost $ 221 [6],[29],[39] $ 215 [7],[30],[40]  
Fair value $ 223 [6],[29],[39] $ 217 [7],[30],[40]  
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.50% [6],[26] 11.50% [7],[15]  
Reference Rate and Spread 6.75% [6],[26] 6.75% [7],[15]  
Principal $ 543 [6],[26] $ 387 [7],[15]  
Cost 520 [6],[26] 359 [7],[15]  
Fair value $ 543 [6],[26] $ 387 [7],[15]  
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.50% [6],[26] 11.50% [7],[15]  
Reference Rate and Spread 6.75% [6],[26] 6.75% [7],[15]  
Principal $ 11,523 [6],[26] $ 10,871 [7],[15]  
Cost 11,388 [6],[26] 10,738 [7],[15]  
Fair value $ 11,523 [6],[26] $ 10,871 [7],[15]  
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Units (in shares) 20,000    
Cost $ 1,000    
Fair value $ 1,000    
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.00%    
Principal $ 4,500    
Cost 4,411    
Fair value $ 4,411    
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Reference Rate and Spread 5.50% [6],[26],[31] 5.50% [7],[15]  
Principal $ 0 [6],[26],[31] $ 0 [7],[15]  
Cost (45) [6],[26],[31] (48) [7],[15]  
Fair value $ (45) [6],[26],[31] $ (48) [7],[15]  
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.23% [6],[26] 10.23% [7],[15]  
Reference Rate and Spread 5.50% [6],[26] 5.50% [7],[15]  
Principal $ 10,714 [6],[26] $ 10,742 [7],[15]  
Cost 10,560 [6],[26] 10,576 [7],[15]  
Fair value $ 10,714 [6],[26] $ 10,742 [7],[15]  
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 2,143 [6] 2,143 [7]  
Cost $ 0 [6] $ 0 [7]  
Fair value $ 0 [6] $ 0 [7]  
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [7],[53]   14.22%  
Reference Rate and Spread [7],[53]   10.00%  
Principal [7],[53]   $ 1,682  
Cost [7],[53]   1,682  
Fair value [7],[53]   $ 1,682  
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.76% [6] 12.07% [7],[15],[36]  
Reference Rate and Spread 10.00% [6] 7.00% [7],[15],[36]  
PIK Rate [7],[15],[36]   1.00%  
Principal $ 1,835 [6] $ 7,334 [7],[15],[36]  
Cost 1,835 [6] 7,254 [7],[15],[36]  
Fair value $ 1,781 [6] $ 1,085 [7],[15],[36]  
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [6],[26],[35] 11.63%    
Reference Rate and Spread [6],[26],[35] 7.00%    
PIK Rate [6],[26],[35] 11.63%    
Principal [6],[26],[35] $ 7,334    
Cost [6],[26],[35] 7,254    
Fair value [6],[26],[35] $ 1,085    
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.84% [8],[26] 10.38% [5],[15]  
Reference Rate and Spread 6.00% [8],[26] 6.00% [5],[15]  
Principal $ 5,596 [8],[26] $ 5,621 [5],[15]  
Cost 5,589 [8],[26] 5,613 [5],[15]  
Fair value $ 4,309 [8],[26] $ 4,342 [5],[15]  
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.32% [6],[26],[54] 10.14% [7],[15]  
Reference Rate and Spread 6.50% [6],[26],[54] 6.50% [7],[15]  
Principal $ 726 [6],[26],[54] $ 622 [7],[15]  
Cost 722 [6],[26],[54] 618 [7],[15]  
Fair value $ 726 [6],[26],[54] $ 622 [7],[15]  
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.23% [6],[26] 10.17% [7],[15]  
Reference Rate and Spread 6.50% [6],[26] 6.50% [7],[15]  
Principal $ 16,889 [6],[26] $ 17,148 [7],[15]  
Cost 16,800 [6],[26] 17,050 [7],[15]  
Fair value $ 16,889 [6],[26] $ 17,148 [7],[15]  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock      
Schedule of Investments [Line Items]      
Units (in shares) 50,753 44,944  
Cost $ 689 $ 449  
Fair value $ 689 $ 449  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 13.50% 12.50%  
Principal $ 1,133 $ 1,133  
Cost 1,110 1,108  
Fair value $ 1,110 $ 1,108  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.50% 12.50%  
Principal $ 788 $ 788  
Cost 772 771  
Fair value $ 772 $ 771  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 13.50% 12.50%  
Principal $ 2,236 $ 2,236  
Cost 2,236 2,236  
Fair value $ 2,236 $ 2,236  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4      
Schedule of Investments [Line Items]      
Total Rate 13.50% 12.50%  
Principal $ 4,928 $ 4,928  
Cost 4,820 4,813  
Fair value $ 4,820 $ 4,813  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5      
Schedule of Investments [Line Items]      
Total Rate 13.50%    
Principal $ 2,800    
Cost 2,655    
Fair value $ 2,655    
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 9.93% [8],[26],[35] 9.93% [5],[15],[36]  
Reference Rate and Spread 7.75% [8],[26],[35] 7.75% [5],[15],[36]  
Principal $ 5,053 [8],[26],[35] $ 5,053 [5],[15],[36]  
Cost 5,031 [8],[26],[35] 5,034 [5],[15],[36]