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FINANCIAL HIGHLIGHTS (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Mar. 31, 2022
Investment Company, Financial Highlights [Roll Forward] |  |  |  |  |  |  |
Net asset value at beginning of period (in USD per share) | $ 13.44 | $ 13.43 | $ 12.66 | $ 11.52 | $ 13.43 | $ 11.52 |
Income from investment operations |  |  |  |  |  |  |
Net investment income (loss) (in USD per share) | 0.34 |  | 0.07 |  | 0.57 | 0 |
Net realized gain (loss) on investments and other (in USD per share) | 0.07 |  | (0.05) |  | 0.20 | 0.01 |
Net unrealized appreciation (depreciation) of investments (in USD per share) | (0.32) |  | 0.83 |  | (0.32) | 2.26 |
Total from investment operations (in USD per share) | 0.09 |  | 0.85 |  | 0.45 | 2.27 |
Effect of equity capital activity |  |  |  |  |  |  |
Cash distributions to common stockholders from net investment income (in USD per share) | (0.14) | (0.10) | (0.16) | (0.20) | (0.24) | (0.36) |
Cash distributions to common stockholders from net realized gains (in USD per share) | (0.08) | (0.25) | (0.08) | (0.07) | (0.33) | (0.15) |
Total from equity capital activity (in USD per share) | (0.22) |  | (0.24) |  | (0.57) | (0.51) |
Other, net (in USD per share) | 0 |  | 0 |  | 0 | (0.01) |
Net asset value at end of period (in USD per share) | 13.31 | 13.44 | 13.27 | 12.66 | 13.31 | 13.27 |
Per common share market value at beginning of period (in USD per share) | 14.08 | 16.13 | 14.41 | 12.23 | 16.13 | 12.23 |
Per common share market value at end of period (in USD per share) | $ 12.10 | $ 14.08 | $ 13.87 | $ 14.41 | $ 12.10 | $ 13.87 |
Total investment return | (12.64%) |  | (2.13%) |  | (21.91%) | 17.51% |
Common stock outstanding at end of period (in shares) | 33,234,663 |  | 33,205,023 |  | 33,234,663 | 33,205,023 | 33,205,023
Statement of Assets and Liabilities Data: |  |  |  |  |  |  |
Net assets at end of period | $ 442,470 |  | $ 440,701 |  | $ 442,470 | $ 440,701 |
Average net assets | 449,419 |  | 426,635 |  | 447,398 | 410,553 |
Senior Securities Data: |  |  |  |  |  |  |
Total borrowings, at cost | $ 279,088 |  | $ 276,484 |  | $ 279,088 | $ 276,484 |
Ratios/Supplemental Data: |  |  |  |  |  |  |
Ratio of net expenses to average net assets – annualized | 8.35% |  | 15.35% |  | 9.52% | 17.88% |
Ratio of net investment income (loss) to average net assets – annualized | 10.16% |  | 2.03% |  | 8.40% | (0.07%) |
Ratio of expenses to average net assets - annualized | 11.50% |  | 17.90% |  | 12.23% | 20.73% |
Ratio of net investment income (loss) to average net assets – annualized | 7.01% |  | (0.52%) |  | 5.69% | (2.91%) |

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