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Financial Highlights - Summary of Financial Highlights (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Feb. 24, 2025 | Jan. 29, 2021
Per Share Data: |  |  |  |  |  |  |
Net asset value, beginning of period | $ 13.19 | $ 13.15 | $ 16.4 | $ 13.03 | $ 14.97 |  |
Net investment income | 2.2 | 2.31 | 2.26 | 1.5 | 1.29 |  |
Net realized and unrealized gains/(losses) on investments | (0.01) | (0.33) | (3.22) | 3.59 | (0.81) |  |
Costs related to acquisition of Trinity Capital Holdings and Legacy Funds |  |  |  |  | (0.82) |  |
Net increase/(decrease) in net assets resulting from operations | 2.19 | 1.98 | (0.96) | 5.09 | (0.34) |  |
Offering costs | (0.05) | (0.09) | (0.12) | (0.29) | (0.58) |  |
Effect of shares issued and repurchased | 0.06 | 0.19 | 0.16 | (0.15) | (0.02) |  |
Equity component of convertible notes |  |  |  | (0.02) | 0.03 |  |
Distributions | (2.04) | (2.04) | (2.33) | (1.26) | (1.03) |  |
Total increase/(decrease) in net assets | 0.16 | 0.04 | (3.25) | 3.37 | (1.94) |  |
Net asset value, end of period | $ 13.35 | $ 13.19 | $ 13.15 | $ 16.4 | $ 13.03 |  |
Shares outstanding, end of period | 61,669,059 | 46,323,712 | 34,960,672 | 27,229,541 | 18,321,274 |  |
Weighted average shares outstanding, basic | 52,705,732 | 38,910,150 | 31,672,089 | 25,980,797 | 18,092,494 |  |
Weighted average shares outstanding, diluted | 56,728,848 | 42,705,875 | 35,189,709 |  |  |  |
Total return based on net asset value | 16.70% | 15.80% | (5.60%) | 35.50% | (6.10%) |  |
Total return based on market value | 14.70% | 55.80% | (29.00%) | 33.20% |  |  |
Ratio/Supplemental Data: |  |  |  |  |  |  |
Per share market value at end of period | $ 14.47 | $ 14.53 | $ 10.93 | $ 17.58 |  | $ 15.93 | $ 14
Net assets, end of period | $ 822,982 | $ 611,159 | $ 459,649 | $ 446,533 | $ 238,748 |  |
Ratio of total expenses to average net assets | 17.50% | 17.90% | 16.30% | 11.60% | 14.30% |  |
Ratio of net investment income to average net assets | 16.70% | 17.50% | 15.70% | 10.50% | 10.50% |  |
Ratio of interest and credit facility expenses to average net assets | 8.90% | 8.60% | 7.50% | 5.50% | 7.60% |  |
Portfolio turnover rate | 53.80% | 41.70% | 33.70% | 47.90% | 36.50% |  |
Asset coverage ratio | 192.70% | 194.70% | 174.10% | 195.80% | 177.00% |  |

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