CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (Parenthetical) - USD ($) $ in Thousands |
Dec. 31, 2022 |
Mar. 31, 2022 |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cost | $ 722,380 | $ 669,248 | [1] | |||||||||||||||
| Line of credit at cost | $ 29,600 | $ 0 | ||||||||||||||||
| Common stock, par value (in USD per share) | $ 0.001 | $ 0.001 | ||||||||||||||||
| Common stock, shares authorized (in shares) | 100,000,000 | 100,000,000 | ||||||||||||||||
| Common stock, shares, issued (In shares) | 33,447,001 | 33,205,023 | ||||||||||||||||
| Common stock, shares, outstanding (in shares) | 33,447,001 | 33,205,023 | ||||||||||||||||
| Non-Control/Non-Affiliate Investments | ||||||||||||||||||
| Cost | $ 431,305 | [2] | $ 388,773 | [3] | ||||||||||||||
| Affiliate Investments | ||||||||||||||||||
| Cost | 290,455 | [4] | 279,855 | [5] | ||||||||||||||
| Control Investments | ||||||||||||||||||
| Cost | $ 620 | [6] | $ 620 | [7] | ||||||||||||||
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