CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (Parenthetical) - USD ($) $ in Thousands |
Dec. 31, 2023 |
Mar. 31, 2023 |
||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cost | $ 868,504 | $ 720,630 | [1] | |||||||||||||||
| Line of credit, cost | $ 82,600 | $ 35,200 | ||||||||||||||||
| Common stock, par value (in USD per share) | $ 0.001 | $ 0.001 | ||||||||||||||||
| Common stock, authorized (in shares) | 100,000,000 | 100,000,000 | ||||||||||||||||
| Common stock, issued (in shares) | 35,351,954 | 33,591,505 | ||||||||||||||||
| Common stock, outstanding (in shares) | 35,351,954 | 33,591,505 | ||||||||||||||||
| Non-Control/Non-Affiliate Investments | ||||||||||||||||||
| Cost | $ 545,299 | [2] | $ 429,305 | [3] | ||||||||||||||
| Affiliate Investments | ||||||||||||||||||
| Cost | 291,146 | [4] | 276,055 | [5] | ||||||||||||||
| Control Investments | ||||||||||||||||||
| Cost | $ 32,059 | [6] | $ 15,270 | [7] | ||||||||||||||
| ||||||||||||||||||