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FINANCIAL HIGHLIGHTS (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 24 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Apr. 11, 2022 | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Apr. 11, 2022 | Sep. 30, 2022
Investment Company, Financial Highlights [Roll Forward] |  |  |  |  |  |  |  |  |  |
Net asset value at beginning of period (in USD per share) |  | $ 9.06 | $ 9.08 | $ 9.44 | $ 9.28 | $ 9.08 | $ 9.28 |  |  |
Income from operations |  |  |  |  |  |  |  |  |  |
Net investment income (in USD per share) |  | 0.26 |  | 0.25 |  | 0.51 | 0.52 |  |  |
Net realized and unrealized gain (loss) on investments (in USD per share) |  | 0.06 |  | (0.02) |  | (0.04) | 0.08 |  |  |
Net realized and unrealized gain (loss) on other (in USD per share) |  | 0.01 |  | 0.01 |  | 0.02 | (0.01) |  |  |
Total from operations (in USD per share) |  | 0.33 |  | 0.24 |  | 0.49 | 0.59 |  |  |
Distributions to common stockholders from |  |  |  |  |  |  |  |  |  |
Net investment income (in USD per share) |  | (0.23) | (0.21) | (0.20) | (0.20) | (0.44) | (0.40) |  |  |
Return of capital (in USD per share) |  | 0 |  | 0 |  | 0 | 0 |  |  |
Total distributions (in dollar per share) |  | (0.23) |  | (0.20) |  | (0.44) | (0.40) |  |  |
Anti-dilutive effect of common stock issuance (in USD per share) |  | 0.04 |  | 0 |  | 0.07 | 0 |  |  |
Total capital share transactions (in USD per share) |  | 0.04 |  | 0 |  | 0.07 | 0 |  |  |
Other, net (in USD per share) |  | (0.01) |  | 0.01 |  | (0.01) | 0.02 |  |  |
Net asset value at end of period (in USD per share) |  | 9.19 | 9.06 | 9.49 | 9.44 | 9.19 | 9.49 | $ 9.19 |  |
Per common share market value at beginning of period (in USD per share) |  | 9.62 | 8.49 | 11.59 | 11.30 | 8.49 | 11.30 |  |  |
Per common share market value at end of period (in USD per share) |  | $ 9.40 | $ 9.62 | $ 11.79 | $ 11.59 | $ 9.40 | $ 11.79 | $ 9.40 |  |
Total return |  | (0.06%) |  | 3.51% |  | 15.70% | 7.95% |  |  |
Common stock outstanding at end of period (in shares) |  | 37,185,569 |  | 34,304,371 |  | 37,185,569 | 34,304,371 | 37,185,569 |  | 34,734,796
Statement of Assets and Liabilities Data: |  |  |  |  |  |  |  |  |  |
Net assets at end of period |  | $ 341,811 |  | $ 325,467 |  | $ 341,811 | $ 325,467 | $ 341,811 |  |
Average net assets |  | 337,720 |  | 324,891 |  | 332,327 | 322,892 |  |  |
Senior Securities Data: |  |  |  |  |  |  |  |  |  |
Borrowings under line of credit, at cost |  | 152,600 |  | 17,400 |  | 152,600 | 17,400 | 152,600 |  |
Notes payable |  | $ 200,000 |  | $ 200,000 |  | $ 200,000 | $ 200,000 | $ 200,000 |  |
Ratios/Supplemental Data: |  |  |  |  |  |  |  |  |  |
Ratio of net expenses to average net assets – annualized |  | 12.94% |  | 10.55% |  | 12.94% | 9.65% |  |  |
Ratio of net investment income to average net assets – annualized |  | 11.41% |  | 10.70% |  | 11.05% | 11.06% |  |  |
Ratio of expenses to average net assets - annualized |  | 16.12% |  | 12.56% |  | 15.96% | 12.78% |  |  |
Ratio of net investment income (loss) to average net assets – annualized | 2.1875% | 8.30% |  | 8.72% |  | 8.09% | 7.98% | 2.50% | 2.4375% |

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