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Consolidated Schedule of Investments In and Advances To Affiliates (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     $ (10,241) $ (868)
Interest income $ 14,291 $ 12,550 41,785 32,738
Dividend income 334 279 1,453 1,042
Fee income 26 539 222 966
Total investment income 14,651 13,368 43,460 34,746
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[2]     500,576  
Fair Value [3],[4] 457,247   457,247  
Investment, Identifier [Axis]: 24 Seven Holdco, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     8,821  
Fair Value [3],[6] 8,532   8,532  
Investment, Identifier [Axis]: AIDC IntermediateCo 2, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     1,943  
Investment, Identifier [Axis]: AIDC IntermediateCo 2, LLC, Senior Secured Loan 1        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 1,970   1,970  
Investment, Identifier [Axis]: AIDC IntermediateCo 2, LLC, Senior Secured Loan 2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 46   46  
Investment, Identifier [Axis]: Advantage Sales & Marketing Inc. (F/K/A Karman Buyer Corp), Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6],[7] 2,190   2,190  
Investment, Identifier [Axis]: All Star Auto Lights, Inc., Senior Secured Loan 1        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     22,890  
Fair Value [3] 22,918   22,918  
Investment, Identifier [Axis]: All Star Auto Lights, Inc., Senior Secured Loan 2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     4,930  
Fair Value [3] 4,938   4,938  
Investment, Identifier [Axis]: Allen Media, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8],[9]     3,103  
Fair Value [3],[6],[7] 3,347   3,347  
Investment, Identifier [Axis]: Apex Credit CLO 2020 Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[10],[11] 7,608   7,608  
Investment, Identifier [Axis]: Apex Credit CLO 2020, Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     7,996  
Investment, Identifier [Axis]: Apex Credit CLO 2021 Ltd, Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     6,141  
Fair Value [3],[10],[11] 5,781   5,781  
Investment, Identifier [Axis]: Apex Credit CLO 2022-1A, Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     8,611  
Fair Value [3],[10],[11] 7,145   7,145  
Investment, Identifier [Axis]: Ares L CLO, Mezzanine Debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     5,272  
Investment, Identifier [Axis]: Ares L CLO, Mezzanine debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 5,488   5,488  
Investment, Identifier [Axis]: Astro One Acquisition Corporation, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     2,246  
Fair Value [3],[14] 385   385  
Investment, Identifier [Axis]: Asurion, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[8]     1,572  
Investment, Identifier [Axis]: Atlantis Holding, LLC , Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8]     8,102  
Investment, Identifier [Axis]: Avison Young, Senior Secured Loan 1        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     3,475  
Fair Value [3],[6] 2,060   2,060  
Investment, Identifier [Axis]: Avison Young, Senior Secured Loan 2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     732  
Fair Value [3] 417   417  
Investment, Identifier [Axis]: BCPE North Star US Holdco 2, Inc.        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 1,464   1,464  
Investment, Identifier [Axis]: BCPE North Star US Holdco 2, Inc. (F/K/A Dessert Holdings), Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     1,540  
Investment, Identifier [Axis]: Barings CLO 2019-I Ltd., Mezzanine Debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     7,308  
Investment, Identifier [Axis]: Barings CLO 2019-I Ltd., Mezzanine debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 7,726   7,726  
Investment, Identifier [Axis]: Battalion CLO XI, Ltd., Mezzanine Debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     5,445  
Investment, Identifier [Axis]: Battalion CLO XI, Ltd., Mezzanine debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 5,650   5,650  
Investment, Identifier [Axis]: BayMark Health Services, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     4,861  
Fair Value [3] 4,917   4,917  
Investment, Identifier [Axis]: BayMark Health Services, Inc., Senior Secured Loan (Delayed Draw)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     3,814  
Fair Value [3] 3,952   3,952  
Investment, Identifier [Axis]: Boca Home Care Holdings, Inc., Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[16],[17]     1,098  
Fair Value [3],[18],[19] 937   937  
Investment, Identifier [Axis]: Boca Home Care Holdings, Inc., Preferred Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 344   344  
Investment, Identifier [Axis]: Boca Home Care Holdings, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     9,201  
Investment, Identifier [Axis]: Boca Home Care Holdings, Inc., Senior Secured Loan (Delayed Draw)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6],[20] 10,636   10,636  
Investment, Identifier [Axis]: Boca Home Care Holdings, Inc., Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     (47)  
Fair Value [3],[20] (48)   (48)  
Investment, Identifier [Axis]: Brightwood Capital MM CLO 2022-1, LTD, Loan accumulation facility        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[21]     8,299  
Investment, Identifier [Axis]: Brightwood Capital MM CLO 2023-1A, Ltd., Mezzanine Debt - Class D        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 887   887  
Investment, Identifier [Axis]: Brightwood Capital MM CLO 2023-1A, Ltd., Mezzanine Debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 1,920   1,920  
Investment, Identifier [Axis]: Brightwood Capital MM CLO 2023-1A, Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[10],[11] 4,840   4,840  
Investment, Identifier [Axis]: Constellis Holdings, LLC, Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[19] 37   37  
Investment, Identifier [Axis]: Constellis Holdings, LLC, Common Equity (20,628 common shares)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[17]     32  
Investment, Identifier [Axis]: Contract Datascan Holdings, Inc. , Preferred Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     6,202  
Investment, Identifier [Axis]: Contract Datascan Holdings, Inc. Common Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     1,459  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     510  
Gross Additions     1,459  
Gross Reductions     0  
Fair Value 1,969   1,969  
Investment, Identifier [Axis]: Contract Datascan Holdings, Inc. Preferred Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     1,811  
Interest income     0  
Dividend income     735  
Fee income     0  
Total investment income     735  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     6,202  
Gross Additions     2,546  
Gross Reductions     0  
Fair Value 8,748   8,748  
Investment, Identifier [Axis]: Contract Datascan Holdings, Inc., Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[17]     510  
Fair Value [3],[19] 1,969   1,969  
Investment, Identifier [Axis]: Contract Datascan Holdings, Inc., Preferred Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 8,748   8,748  
Investment, Identifier [Axis]: Convergint Technologies Holdings, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     5,767  
Fair Value [3] 5,897   5,897  
Investment, Identifier [Axis]: Creation Technologies, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[22]     1,854  
Fair Value [3],[6],[23] 1,866   1,866  
Investment, Identifier [Axis]: DRF Imaging Services, LLC Common Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     (1,211)  
Interest income     0  
Dividend income     34  
Fee income     0  
Total investment income     34  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     1,569  
Gross Additions     0  
Gross Reductions     (1,211)  
Fair Value 358   358  
Investment, Identifier [Axis]: DRS Imaging Services, LLC, Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[16],[17],[24]     1,568  
Fair Value [3],[18],[25] 358   358  
Investment, Identifier [Axis]: Diamond Sports Group, LLC, Senior Secured Loan (1)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 132   132  
Investment, Identifier [Axis]: Diamond Sports Group, LLC, Senior Secured Loan (2)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[19] 46   46  
Investment, Identifier [Axis]: Diamond Sports Group, LLC, Senior Secured Loan 1        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     240  
Investment, Identifier [Axis]: Diamond Sports Group, LLC, Senior Secured Loan 2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[26]     248  
Investment, Identifier [Axis]: Dryden 53 CLO, LTD., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     823  
Investment, Identifier [Axis]: Dryden 53 CLO, LTD., Subordinated Notes - Income        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     1,029  
Investment, Identifier [Axis]: Dryden 53 CLO, Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 558   558  
Investment, Identifier [Axis]: Dryden 53 CLO, Ltd., Subordinated Notes - Income        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 698   698  
Investment, Identifier [Axis]: Dryden 76 CLO, Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     2,030  
Fair Value [3],[10],[11] 1,837   1,837  
Investment, Identifier [Axis]: East West Manufacturing, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     1,873  
Fair Value [3],[6] 1,850   1,850  
Investment, Identifier [Axis]: East West Manufacturing, Senior Secured Loan (Delayed Draw)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     (11)  
Investment, Identifier [Axis]: Eblens Holdings, Inc. Common Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     (1,306)  
Net change in unrealized appreciation/(depreciation)     950  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     0  
Gross Additions     356  
Gross Reductions     (356)  
Fair Value 0   0  
Investment, Identifier [Axis]: Eblens Holdings, Inc. Subordinated Loan 1        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     (4,605)  
Net change in unrealized appreciation/(depreciation)     3,501  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     1,104  
Gross Additions     0  
Gross Reductions     (1,104)  
Fair Value 0   0  
Investment, Identifier [Axis]: Eblens Holdings, Inc. Subordinated Loan 2        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     (4,605)  
Net change in unrealized appreciation/(depreciation)     4,605  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     0  
Gross Additions     0  
Gross Reductions     0  
Fair Value 0   0  
Investment, Identifier [Axis]: Eblens Holdings, Inc., Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[17]     0  
Investment, Identifier [Axis]: Eblens Holdings, Inc., Subordinated  Loan 1        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[26]     1,104  
Investment, Identifier [Axis]: Eblens Holdings, Inc., Subordinated  Loan 2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[26]     0  
Investment, Identifier [Axis]: Electrical Components International, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     3,468  
Fair Value [3] 3,603   3,603  
Investment, Identifier [Axis]: Elevation CLO 2017-7, Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13],[27]     118  
Fair Value [3],[10],[11],[19],[28] 97   97  
Investment, Identifier [Axis]: EnergySolutions, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     1,652  
Investment, Identifier [Axis]: Envocore Holding, LLC (F/K/A LRI Holding, LLC), Equity Participation Rights        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[17],[29]     0  
Fair Value [3],[19],[30] 0   0  
Investment, Identifier [Axis]: Envocore Holding, LLC (F/K/A LRI Holding, LLC), Senior Secured Loan (1)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 6,311   6,311  
Investment, Identifier [Axis]: Envocore Holding, LLC (F/K/A LRI Holding, LLC), Senior Secured Loan (2)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[14],[19] 3,528   3,528  
Investment, Identifier [Axis]: Envocore Holding, LLC (F/K/A LRI Holding, LLC), Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     0  
Fair Value [3],[20] 0   0  
Investment, Identifier [Axis]: Envocore Holding, LLC (F/K/A LRI Holding, LLC), Senior Secured Loan 1        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     6,359  
Investment, Identifier [Axis]: Envocore Holding, LLC (F/K/A LRI Holding, LLC), Senior Secured Loan 2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[17],[26]     2,887  
Investment, Identifier [Axis]: Excelin Home Health, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[31]     3,987  
Fair Value [3],[14],[32] 3,443   3,443  
Investment, Identifier [Axis]: Flatiron CLO 18, Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     5,587  
Fair Value [3],[10],[11] 5,234   5,234  
Investment, Identifier [Axis]: GGC Aerospace Topco L.P., Common Equity (Class A units)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 0   0  
Investment, Identifier [Axis]: GGC Aerospace Topco L.P., Common Equity (Class B units)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 0   0  
Investment, Identifier [Axis]: GGC Aerospace Topco L.P., Common Equity Class A Units        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[17]     0  
Investment, Identifier [Axis]: GGC Aerospace Topco L.P., Common Equity Class B Units        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[17]     0  
Investment, Identifier [Axis]: GoTo Group (F/K/A LogMeIn, Inc.), Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6],[7] 1,955   1,955  
Investment, Identifier [Axis]: Heritage Grocers Group, LLC (F/K/A Tony's Fresh Market/ Cardenas Markets), Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6] 5,957   5,957  
Investment, Identifier [Axis]: Honor HN Buyer Inc, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     6,426  
Fair Value [3],[6] 6,483   6,483  
Investment, Identifier [Axis]: Honor HN Buyer Inc, Senior Secured Loan (Delayed Draw 1)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6] 4,099   4,099  
Investment, Identifier [Axis]: Honor HN Buyer Inc, Senior Secured Loan (Delayed Draw 2)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6],[20] 1,889   1,889  
Investment, Identifier [Axis]: Honor HN Buyer Inc, Senior Secured Loan (Delayed Draw)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     1,762  
Investment, Identifier [Axis]: Honor HN Buyer Inc, Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     (12)  
Fair Value [3],[20] 95   95  
Investment, Identifier [Axis]: Idera, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     3,732  
Fair Value [3] 4,000   4,000  
Investment, Identifier [Axis]: Inergex Holdings, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[33]     14,868  
Fair Value [3] 14,868   14,868  
Investment, Identifier [Axis]: Inergex Holdings, LLC, Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     0  
Fair Value [3] 2,344   2,344  
Investment, Identifier [Axis]: Ivanti Software, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8]     2,359  
Fair Value [3],[6],[7] 2,552   2,552  
Investment, Identifier [Axis]: JP Intermediate B, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     4,622  
Fair Value [3],[6] 3,608   3,608  
Investment, Identifier [Axis]: KNS Acquisition Corp. , Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     6,515  
Investment, Identifier [Axis]: Karman Buyer Corp, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8]     1,898  
Investment, Identifier [Axis]: Kreg LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     15,675  
Fair Value [3],[6],[34] 15,826   15,826  
Investment, Identifier [Axis]: Kreg LLC, Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     (71)  
Fair Value [3],[20] (95)   (95)  
Investment, Identifier [Axis]: LogMeIn, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8]     1,909  
Investment, Identifier [Axis]: Madison Park Funding XXIII, Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     5,319  
Fair Value [3],[10],[11] 5,168   5,168  
Investment, Identifier [Axis]: Madison Park Funding XXIX, Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     5,645  
Fair Value [3],[10],[11] 5,820   5,820  
Investment, Identifier [Axis]: Master Cutlery, LLC (4) (10) (20)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[14],[34] 100   100  
Investment, Identifier [Axis]: Master Cutlery, LLC Common Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     0  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     0  
Gross Additions     0  
Gross Reductions     0  
Fair Value 0   0  
Investment, Identifier [Axis]: Master Cutlery, LLC Preferred Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     0  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     0  
Gross Additions     0  
Gross Reductions     0  
Fair Value 0   0  
Investment, Identifier [Axis]: Master Cutlery, LLC Subordinated Loan        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     (22)  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     122  
Gross Additions     0  
Gross Reductions     (22)  
Fair Value 100   100  
Investment, Identifier [Axis]: Master Cutlery, LLC, Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     0  
Investment, Identifier [Axis]: Master Cutlery, LLC, Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 0   0  
Investment, Identifier [Axis]: Master Cutlery, LLC, Preferred Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     0  
Fair Value [3] 0   0  
Investment, Identifier [Axis]: Master Cutlery, LLC, Subordinated Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[26],[33]     122  
Investment, Identifier [Axis]: Metasource, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     2,592  
Fair Value [3] 2,598   2,598  
Investment, Identifier [Axis]: Metasource, Senior Secured Loan (Delayed Draw)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     (81)  
Fair Value [3],[20] (69)   (69)  
Investment, Identifier [Axis]: Milrose Consultants, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     26,700  
Investment, Identifier [Axis]: Milrose Consultants, LLC, Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     448  
Investment, Identifier [Axis]: Monroe Capital MML CLO X, Ltd., Mezzanine Debt - Class E-R        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     874  
Investment, Identifier [Axis]: Monroe Capital MML CLO X, Ltd., Mezzanine debt - Class E-R        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 936   936  
Investment, Identifier [Axis]: Octagon Investment Partners 39, Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     3,202  
Fair Value [3],[10],[11] 2,369   2,369  
Investment, Identifier [Axis]: One GI LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     7,039  
Investment, Identifier [Axis]: One GI LLC, Senior Secured Loan (Delayed Draw)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[15]     3,698  
Investment, Identifier [Axis]: One GI LLC, Senior Secured Loan (Delayed Draw) (1)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6] 7,008   7,008  
Investment, Identifier [Axis]: One GI LLC, Senior Secured Loan (Delayed Draw) (2)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6],[20] 3,692   3,692  
Investment, Identifier [Axis]: One GI LLC, Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     (90)  
Fair Value [3] 1,359   1,359  
Investment, Identifier [Axis]: PM Acquisition LLC, Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[16],[17]     967  
Investment, Identifier [Axis]: PM Acquisition LLC, Common Equity (499 units)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[19],[25] 620   620  
Investment, Identifier [Axis]: Park Avenue Institutional Advisers CLO Ltd 2021-1, Mezzanine Debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     910  
Investment, Identifier [Axis]: Park Avenue Institutional Advisers CLO Ltd 2021-1, Mezzanine debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 976   976  
Investment, Identifier [Axis]: Pfanstiehl Holdings, Inc Common Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     (8,351)  
Interest income     0  
Dividend income     547  
Fee income     0  
Total investment income     547  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     85,456  
Gross Additions     0  
Gross Reductions     (8,351)  
Fair Value 77,105   77,105  
Investment, Identifier [Axis]: Pfanstiehl Holdings, Inc., Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[9],[17],[24],[31]     85,456  
Fair Value [3],[25],[32],[35] 77,105   77,105  
Investment, Identifier [Axis]: Planet Bingo, LLC (F/K/A 3rd Rock Gaming Holdings, LLC), Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[26]     6,864  
Fair Value [3],[14] 6,588   6,588  
Investment, Identifier [Axis]: RC Buyer, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     1,064  
Investment, Identifier [Axis]: RPLF Holdings, LLC (10), Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[16],[17]     406  
Investment, Identifier [Axis]: RPLF Holdings, LLC, Common Equity (345,339 Class A units)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[18] 1,189   1,189  
Investment, Identifier [Axis]: RSA Security, Senior Secured Loan 1        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[8]     1,931  
Investment, Identifier [Axis]: RSA Security, Senior Secured Loan 2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     3,350  
Investment, Identifier [Axis]: Reception Purchaser LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     2,501  
Fair Value [3],[6] 2,381   2,381  
Investment, Identifier [Axis]: Redding Ridge 4, Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     695  
Fair Value [3],[10],[11] 567   567  
Investment, Identifier [Axis]: Redstone Holdco 2 LP (F/K/A RSA Security), Senior Secured Loan (1)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[7] 1,478   1,478  
Investment, Identifier [Axis]: Redstone Holdco 2 LP (F/K/A RSA Security), Senior Secured Loan (2)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 3,464   3,464  
Investment, Identifier [Axis]: Regatta II Funding, Mezzanine Debt - Class DR2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     738  
Investment, Identifier [Axis]: Regatta II Funding, Mezzanine debt - Class DR2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 771   771  
Investment, Identifier [Axis]: Regatta XXII Funding Ltd, Mezzanine Debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     2,990  
Investment, Identifier [Axis]: Regatta XXII Funding Ltd, Mezzanine debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 3,055   3,055  
Investment, Identifier [Axis]: RumbleOn, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     3,617  
Fair Value [3],[34] 2,995   2,995  
Investment, Identifier [Axis]: RumbleOn, Inc., Senior Secured Loan (Delayed Draw)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     1,042  
Fair Value [3] 1,101   1,101  
Investment, Identifier [Axis]: RumbleOn, Inc., Warrants        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     0  
Fair Value [3],[19] 45   45  
Investment, Identifier [Axis]: SS Acquisition, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[36]     2,988  
Fair Value [3],[37] 3,042   3,042  
Investment, Identifier [Axis]: SS Acquisition, LLC, Senior Secured Loan (Delayed Draw)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     1,184  
Fair Value [3] 1,460   1,460  
Investment, Identifier [Axis]: SSJA Bariatric Management LLC, Senior Secured Loan (1)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 9,578   9,578  
Investment, Identifier [Axis]: SSJA Bariatric Management LLC, Senior Secured Loan (2)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 1,035   1,035  
Investment, Identifier [Axis]: SSJA Bariatric Management LLC, Senior Secured Loan (3)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 2,607   2,607  
Investment, Identifier [Axis]: SSJA Bariatric Management LLC, Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     (11)  
Fair Value [3],[20] 199   199  
Investment, Identifier [Axis]: SSJA Bariatric Management LLC, Senior Secured Loan 1        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     9,513  
Investment, Identifier [Axis]: SSJA Bariatric Management LLC, Senior Secured Loan 2        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     1,028  
Investment, Identifier [Axis]: SSJA Bariatric Management LLC, Senior Secured Loan 3        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     2,589  
Investment, Identifier [Axis]: STS Operating, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     9,073  
Fair Value [3] 9,073   9,073  
Investment, Identifier [Axis]: Sentry Centers Holdings, LLC, Preferred Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[16],[17]     80  
Investment, Identifier [Axis]: Sentry Centers Holdings, LLC, Preferred Equity (1,603 Series B units)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[18],[19] 157   157  
Investment, Identifier [Axis]: Signal Parent, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8]     1,566  
Fair Value [3],[6],[7] 1,533   1,533  
Investment, Identifier [Axis]: Spear Education Holdings, LLC Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6] 1,472   1,472  
Investment, Identifier [Axis]: Spring Education Group, Inc. (F/K/A SSH Group Holdings, Inc.), Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     6,182  
Investment, Identifier [Axis]: Spring Education Group, Inc. (F/K/A SSH Group Holdings, Inc.,), Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6] 6,399   6,399  
Investment, Identifier [Axis]: Staples, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8],[22]     2,689  
Fair Value [3],[6],[7],[23] 2,475   2,475  
Investment, Identifier [Axis]: THL Credit Wind River 2019‐3 CLO Ltd, Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[10],[11] 3,206   3,206  
Investment, Identifier [Axis]: THL Credit Wind River 2019‐3 CLO Ltd., Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     3,926  
Investment, Identifier [Axis]: TRS Services, Inc. Common Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     0  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     0  
Gross Additions     0  
Gross Reductions     0  
Fair Value 0   0  
Investment, Identifier [Axis]: TRS Services, Inc. Preferred Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     579  
Interest income     0  
Dividend income     118  
Fee income     0  
Total investment income     118  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     1,890  
Gross Additions     647  
Gross Reductions     0  
Fair Value 2,537   2,537  
Investment, Identifier [Axis]: TRS Services, LLC, Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     0  
Investment, Identifier [Axis]: TRS Services, LLC, Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[19] 0   0  
Investment, Identifier [Axis]: TRS Services, LLC, Preferred Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     1,890  
Investment, Identifier [Axis]: TRS Services, LLC, Preferred Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 2,537   2,537  
Investment, Identifier [Axis]: TalentSmart Holdings, LLC Common Equity        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     (305)  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     953  
Gross Additions     0  
Gross Reductions     (305)  
Fair Value 648   648  
Investment, Identifier [Axis]: TalentSmart Holdings, LLC, Common Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[16],[17],[24]     953  
Fair Value [3],[18],[19],[25] 648   648  
Investment, Identifier [Axis]: The Escape Game, LLC, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     16,497  
Fair Value [3],[6] 21,210   21,210  
Investment, Identifier [Axis]: The Escape Game, LLC, Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     0  
Fair Value [3],[20] 2,800   2,800  
Investment, Identifier [Axis]: Thryv, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8]     3,930  
Investment, Identifier [Axis]: Tolemar Acquisition, Inc., Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     15,504  
Fair Value [3],[6] 14,495   14,495  
Investment, Identifier [Axis]: Tolemar Acquisition, Inc., Senior Secured Loan (Revolver)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[15]     438  
Fair Value [3],[20] 443   443  
Investment, Identifier [Axis]: Tony's Fresh Market / Cardenas Markets, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5]     5,532  
Investment, Identifier [Axis]: Total Affiliate Investments        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     96,701  
Investment, Identifier [Axis]: Trinitas CLO VIII, Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     2,216  
Fair Value [3],[10],[11] 1,692   1,692  
Investment, Identifier [Axis]: TruGreen Limited Partnership, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     4,226  
Fair Value [3] 4,410   4,410  
Investment, Identifier [Axis]: United Biologics Holdings, LLC, Preferred Equity        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     24  
Investment, Identifier [Axis]: United Biologics Holdings, LLC, Preferred Equity (4,701 units)        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[19],[32] 20   20  
Investment, Identifier [Axis]: United Biologics Holdings, LLC, Warrants        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     11  
Investment, Identifier [Axis]: Venture 45 CLO Ltd., Mezzanine Debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     2,876  
Investment, Identifier [Axis]: Venture 45 CLO Ltd., Mezzanine debt - Class E        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3] 2,900   2,900  
Investment, Identifier [Axis]: Wellfleet CLO 2018-2, Subordinated Notes        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[12],[13]     471  
Fair Value [3],[10],[11] 359   359  
Investment, Identifier [Axis]: Wllful, Inc. (F/K/A KNS Acquisition Corp.), Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [3],[6],[7] 6,337   6,337  
Investment, Identifier [Axis]: Yahoo / Verizon Media, Senior Secured Loan        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[5],[8]     2,843  
Eblens Holdings, Inc.        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     (10,516)  
Net change in unrealized appreciation/(depreciation)     9,056  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[24]     1,104  
Gross Additions     356  
Gross Reductions     (1,460)  
Fair Value 0   0  
Contract Datascan Holdings, Inc.        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     3,270  
Interest income     0  
Dividend income     735  
Fee income     0  
Total investment income     735  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[24],[31]     6,712  
Gross Additions     4,005  
Gross Reductions     0  
Fair Value [3],[25],[32] 10,717   10,717  
Master Cutlery, LLC        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     (22)  
Interest income     0  
Dividend income     0  
Fee income     0  
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[17],[24],[31]     122  
Gross Additions     0  
Gross Reductions     (22)  
Fair Value [3],[19],[25],[32] 100   100  
TRS Services, LLC        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation)     579  
Interest income     0  
Dividend income     118  
Fee income     0  
Total investment income     118  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1],[24],[31]     1,890  
Gross Additions     647  
Gross Reductions     0  
Fair Value [3],[19],[25],[32] 2,537   2,537  
Affiliate Investments        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     (10,516)  
Net change in unrealized appreciation/(depreciation)     3,016  
Interest income     0  
Dividend income     1,434  
Fee income     0  
Total investment income     1,434  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     97,805  
Gross Additions     5,008  
Gross Reductions     (11,349)  
Fair Value 91,465   91,465  
Control investment        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss) 0 0 (10,516) 278
Net change in unrealized appreciation/(depreciation) 0 0 9,056 (1,684)
Interest income 0 0 0 141
Dividend income 0 0 0 45
Fee income 0 0 0 6
Total investment income     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value [1]     1,104  
Gross Additions     356  
Gross Reductions     (1,460)  
Fair Value 0   0  
Affiliate investments        
Investments in and Advances to Affiliates [Line Items]        
Net realized gain (loss)     0  
Net change in unrealized appreciation/(depreciation) (4,917) 650 (6,040) 19,683
Interest income     0  
Dividend income 323 $ 279 1,434 $ 284
Fee income     0  
Total investment income     1,434  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Fair Value     96,701  
Gross Additions     4,652  
Gross Reductions     (9,889)  
Fair Value [3] $ 91,465   $ 91,465  
[1] Unless otherwise noted with footnote 14, fair value was determined using significant unobservable inputs for all of the Company’s investments and are considered Level 3 under GAAP. See Note 5 for further details.
[2] Equity ownership may be held in shares or units of companies affiliated with the portfolio company. The Company’s investments are generally classified as “restricted securities” as such term is defined under Regulation S-X Rule 6-03(f) or Securities Act Rule 144.
[3] Unless otherwise noted in footnote 14, fair value was determined using significant unobservable inputs for all of the Company’s investments and are considered Level 3 under GAAP. See Note 5 for further details.
[4] Equity ownership may be held in shares or units of companies affiliated with the portfolio company. The Company’s investments are generally classified as “restricted securities” as such term is defined under Regulation S-X Rule 6-03(f) or Securities Act Rule 144.
[5] Investments (or a portion thereof) held by OFSCC-FS. These assets are pledged as collateral of the BNP Facility and cannot be pledged under any other debt obligation of the Company.
[6] Investments (or a portion thereof) held by OFSCC-FS. These assets are pledged as collateral of the BNP Facility and cannot be pledged under any debt obligation of the Parent.
[7] Fair value was determined by reference to observable inputs other than quoted prices in active markets and are considered Level 2 under GAAP. See Note 5 for further details.
[8] Fair value was determined by reference to observable inputs other than quoted prices in active markets and are considered Level 2 under GAAP. See Note 5 for further details.
[9] Portfolio company at fair value represents greater than 5% of total assets at December 31, 2022.
[10] Amortized cost reflects accretion of effective yield less any cash distributions received or entitled to be received from CLO subordinated note investments. CLO subordinated note positions are entitled to recurring distributions, which are generally equal to the residual cash flow of payments received on underlying securities less contractual payments to debt holders and fund expenses.
[11] The rate disclosed on CLO subordinated note investments is the estimated effective yield, generally established at purchase and re-evaluated upon receipt of distributions, and based upon projected amounts and timing of future distributions and the projected amounts and timing of terminal principal payments at the time of estimation. The estimated yield and investment cost may ultimately not be realized.
[12] Amortized cost reflects accretion of effective yield less any cash distributions received or entitled to be received from CLO subordinated note investments. CLO subordinated note positions are entitled to recurring distributions, which are generally equal to the residual cash flow of payments received on underlying securities less contractual payments to debt holders and fund expenses.
[13] The rate disclosed on subordinated note investments is the estimated effective yield, generally established at purchase and re-evaluated upon receipt of distributions, and based upon projected amounts and timing of future distributions and the projected amounts and timing of terminal principal payments at the time of estimation. The estimated yield and investment cost may ultimately not be realized.
[14] Investment was on non-accrual status as of September 30, 2023, meaning the Company has suspended recognition of all or a portion of income on the investment. See Note 4 for further details.
[15] Subject to unfunded commitments. See Note 6.
[16] All or a portion of investment held by a wholly owned subsidiary subject to income tax.
[17] Non-income producing.
[18] All or a portion of investment held by a wholly owned subsidiary subject to income tax.
[19] Non-income producing.
[20] Subject to unfunded commitments. See Note 6.
[21] Loan accumulation facilities are financing structures intended to aggregate loans that are expected to form part of the portfolio of a future CLO vehicle. Reported yields represent an estimated yield to be earned on the investment. Income notes associated with loan accumulation facilities generally pay returns equal to the income earned on facility assets, less costs of debt financing and manager costs and expenses. In January 2023, the Company prospectively adjusted the estimated yield on this position to 0.00% due to an adverse change in estimated cash flows in accordance with ASC 325-40. As of December 31, 2022, the fair value of the loan accumulation facility was determined by a probability weighted NAV analysis.
[22] Non-qualifying assets under Section 55(a) of the 1940 Act. Qualifying assets as defined in Section 55 of the 1940 Act must represent at least 70% of the Company's assets immediately following the acquisition of any additional non-qualifying assets. As of December 31, 2022, approximately 80% of the Company's assets were qualifying assets.
[23] Non-qualifying assets under Section 55(a) of the 1940 Act. Qualifying assets as defined in Section 55 of the 1940 Act must represent at least 70% of the Company’s assets immediately following the acquisition of any additional non-qualifying assets. As of September 30, 2023, approximately 80% of the Company's assets were qualifying assets.
[24] The Company has an observer seat on the portfolio company’s board of directors.
[25] The Company has an observer seat on the portfolio company’s board of directors.
[26] Investment was on non-accrual status as of December 31, 2022, meaning the Company has suspended recognition of all or a portion of income on the investment. See Note 4 for further details.
[27] As of December 31, 2022, the effective accretable yield has been estimated to be 0%, as the aggregate amount of projected distributions, including projected distributions related to liquidation of the underlying portfolio upon the security's anticipated optional redemption, is less than current amortized cost. Projected distributions are periodically monitored and re-evaluated. All actual distributions will be recognized as reductions to amortized cost until such time, if and when occurring, a future aggregate amount of then-projected distributions exceeds the security's then-current amortized cost.
[28] As of September 30, 2023, the investment has been optionally redeemed and is in the process of liquidating. Remaining residual distributions are anticipated to be recognized as a return of capital.
[29] Equity participation rights issued by unaffiliated third party fully covered with underlying positions in the portfolio company.
[30] Equity participation rights issued by an unaffiliated third party fully covered with underlying positions in the portfolio company.
[31] Investments (or portion thereof) held by SBIC I LP. These assets are pledged as collateral of the SBA debentures and cannot be pledged under any debt obligation of the Company.
[32] Investments (or portion thereof) held by SBIC I LP. These assets are pledged as collateral of the SBA debentures and cannot be pledged under any debt obligation of the Company.
[33] The interest rate on these investments contains a PIK provision, whereby the issuer has the option to make interest payments in cash or with the issuance of additional securities as payment of the entire PIK provision. The interest rate in the schedule represents the current interest rate in effect for these investments. The following table provides additional details on these PIK investments, including the maximum annual PIK interest rate allowed as of December 31, 2022:
Portfolio CompanyInvestment TypeRange of PIK
Option		Range of Cash
Option		Maximum PIK
Rate Allowed
Inergex Holdings, LLCSenior Secured Loan
0% to 2.00%
12.15% to 14.15%
2.00%
Master Cutlery, LLCSenior Secured Loan
0% to 13.00%
0% to 13.00%
13.00%
[34] The interest rate on these investments contains a PIK provision, whereby the issuer has the option to make interest payments in cash or with the issuance of additional securities as payment of the entire PIK provision. The interest rate in the schedule represents the current interest rate in effect for these investments. The following table provides additional details on these PIK investments, including the maximum annual PIK interest rate allowed as of September 30, 2023:
Portfolio CompanyInvestment TypeRange of PIK
Option		Range of Cash
Option		Maximum PIK
Rate Allowed
Inergex Holdings, LLCSenior Secured Loan
0% to 2.00%
12.59% to 14.59%
2.00%
Inergex Holdings, LLCSenior Secured - Revolver
0% to 2.00%
12.59% to 14.59%
2.00%
Kreg, LLCSenior Secured Loan
0% to 2.00%
10.29% to 12.29%
2.50%
Master Cutlery, LLCSubordinated Loan
0% to 13.00%
0% to 13.00%
13.00%
RumbleOn, Inc.Senior Secured Loan
0% to 0.50%
13.90% to 14.40%
0.50%
[35] Portfolio company represents greater than 5% of total assets as of September 30, 2023.
[36] The Company has entered into a contractual arrangement with co‑lenders whereby, subject to certain conditions, it has agreed to receive its payment after the repayment of certain co‑lenders pursuant to a payment waterfall. The table below provides additional details as of December 31, 2022:
Portfolio CompanyReported Interest RateInterest Rate per Credit AgreementAdditional Interest per Annum
SS Acquisition, LLC11.10%10.49%0.61%
SS Acquisition, LLC (Delayed Draw)11.84%10.49%1.35%
[37] The Company has entered into a contractual arrangement with co‑lenders whereby, subject to certain conditions, it has agreed to receive its payment after the repayment of certain co‑lenders pursuant to a payment waterfall. The table below provides additional details as of September 30, 2023:
Portfolio CompanyReported Interest RateInterest Rate per Credit AgreementAdditional Interest per Annum
SS Acquisition, LLC12.27%11.75%0.52%
SS Acquisition, LLC (Delayed Draw)13.03%11.75%1.28%