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Commitments and Contingencies - Summary of Outstanding Commitments to Fund Investments in Current Portfolio Companies (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	$ 22,102	$ 34,959
Accordion Partners LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		698
Accordion Partners LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		872
Accordion Partners LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	872
Accordion Partners LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		1,531
Accordion Partners LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	1,148
Analogic Corporation | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	58	23
Anthem Sports & Entertainment Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	83	83
Beta Plus Technologies, Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		2,415
Beta Plus Technologies, Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	1,683
Bradshaw International Parent Corp. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		922
Bradshaw International Parent Corp. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	922
Bristol Hospice | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		55
Centric Brands Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		428
Centric Brands Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	331	58
Centric Brands Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	97
Critical Nurse Staffing, LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		3,094
Critical Nurse Staffing, LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	3,094
Critical Nurse Staffing, LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		1,400
Critical Nurse Staffing, LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	480
Dentive, LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	234	234
Dentive, LLC | Delayed Draw Term Loan - First Lien
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		748
Dentive, LLC | Delayed Draw Term Loan - First Lien
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	748
Global Integrated Flooring Systems Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	17
GreenPark Infrastructure, LLC | Preferred Equity
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	1,829	1,829
H.W. Lochner, Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	1,799	1,799
Keg Logistics LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		436
Luminii LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	172	172
Marble Point Credit Management LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		2,500
Maxor National Pharmacy Services, LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		585
Naviga Inc. | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	77	77
Netwrix Corporation | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	861	1,148
Netwrix Corporation | Delayed Draw Term Loan - First Lien
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	1,005	1,017
Premier Imaging, LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		1,378
Premier Imaging, LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	1,378
Series A-Great Lakes Funding II LLC | Joint Venture
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	2,494	8,038
TA/WEG Holdings, LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		2,634
TA/WEG Holdings, LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	1,934
TA/WEG Holdings, LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		784
TA/WEG Holdings, LLC | Revolver
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	784
TLE Holdings, LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value		$ 2
TLE Holdings, LLC | Delayed Draw Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Portfolio Company Commitments, Par Value	$ 2

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+ References

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Amount of financial support to be provided in future by investment company to investee.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=66023616&loc=SL35737436-115832

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