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Portfolio Company Investments - Schedule of Debt Investment on Non-Accrual Status (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | $ 20,507 | $ 10,267
Fair Value | K2 Merger Agreement Agent, LLC (fka K2 Industrial Services, Inc.) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | 2,123 | 2,123
Fair Value | Allredi, LLC (fka Marco Group International OpCo, LLC) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | 8,742 | 8,144
Fair Value | Suited Connector LLC |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | 9,642 |
Cost |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | 43,137 | 27,204
Cost | EBL, LLC (EbLens) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | 9,332 | 9,332
Cost | US GreenFiber, LLC |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | 5,223 | 5,223
Cost | K2 Merger Agreement Agent, LLC (fka K2 Industrial Services, Inc.) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | 2,368 | 2,368
Cost | Allredi, LLC (fka Marco Group International OpCo, LLC) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | 10,281 | $ 10,281
Cost | Suited Connector LLC |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total | $ 15,933 |

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