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Acquisitions of Garrison Capital Inc. And Harvest Capital Credit Corporation - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Parenthetical) (Details) - USD ($) | Jun. 09, 2021 | Oct. 28, 2020 | Jun. 24, 2020 | Sep. 30, 2023 | Dec. 31, 2022
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Business Acquisition [Line Items] |  |  |  |  |
Investments at fair value, amortized cost |  |  |  | $ 584,586,000 | $ 652,217,000
Common stock, issued |  |  |  | 9,938,935 | 9,916,856
Common stock, par value |  |  |  | $ 0.01 | $ 0.01
GARS Acquisition |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Transaction offering costs |  |  | $ 432,000 |  |
Investments at fair value, amortized cost |  |  | $ 277,380,000 |  |
Common stock, issued |  | 1.917 |  |  |
Common stock, par value |  | $ 1.26 |  |  |
Additional consideration funded by adviser |  | $ 5,000,000 |  |  |
GARS Acquisition | Common Stock |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Common stock, issued |  | 30,765,640 |  |  |
Common stock, par value |  | $ 0.01 |  |  |
HCAP Acquisition |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Transaction offering costs | $ 519,000 |  |  |  |
Investments at fair value, amortized cost | $ 53,812,000 |  |  |  |
Common stock, par value | $ 2.43 |  |  |  |
Cash purchase price | $ 18,537,512.65 |  |  |  |
Additional consideration funded by adviser | $ 2,150,000 |  |  |  |
HCAP Acquisition | Common Stock |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Common stock, issued | 15,252,453 |  |  |  |
Common stock, par value | $ 0.01 |  |  |  |

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