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Financial Highlights - Schedule of Financial Highlights (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Investment Company, Financial Highlights [Line Items] |  |  |  |
Net asset value at beginning of period |  |  | $ 19.96 | $ 16.81
Net investment income |  |  | 1.39 | 0.93
Net realized gain (loss) on investments, net of tax (provision) |  |  | 2.67 | 0.57
Net unrealized appreciation (depreciation) on investments |  |  | (2.78) | 1.31
Realized losses on extinguishment of debt |  |  | (0.01) | (0.11)
Total increase from investment operations |  |  | 1.27 | 2.70
Dividends declared to stockholders |  |  | (1.82) | (1.19)
Other |  |  |  | (0.01)
Net asset value at end of period | $ 19.41 | $ 18.31 | 19.41 | 18.31
Market value at end of period | $ 17.18 | $ 17.44 | $ 17.18 | $ 17.44
Shares outstanding at end of period | 24,437,400 | 24,437,400 | 24,437,400 | 24,437,400
Weighted average number of shares outstanding - basic | 24,437,400 | 24,437,400 | 24,437,400 | 24,437,400
Weighted average number of shares outstanding - diluted | 24,437,400 | 24,437,400 | 24,437,400 | 24,437,400
Net assets at end of period | $ 474,387 | $ 447,545 | $ 474,387 | $ 447,545
Average net assets | $ 483,157 | $ 425,171 | $ 483,157 | $ 425,171
Total expenses |  |  | 9.00% | 13.70%
Net investment income |  |  | 9.40% | 7.10%
Total return based on market value |  |  | 3.20% | 46.10%
Total return based on net asset value |  |  | 6.40% | 16.00%
Portfolio turnover ratio |  |  | 21.30% | 44.90%
Average debt outstanding |  |  | $ 391,585 | $ 382,587
Average debt per share |  |  | $ 16.02 | $ 15.66

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