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FINANCIAL HIGHLIGHTS (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2023
Investment Company, Financial Highlights [Roll Forward] |  |  |
Net asset value at beginning of period (in USD per share) | $ 9.39 | $ 9.08 |
Income from operations |  |  |
Net investment income (in USD per share) | 0.27 | 0.25 |
Net realized and unrealized gain (loss) on investments (in USD per share) | 0.19 | (0.10) |
Net realized and unrealized gain (loss) on other (in USD per share) | 0 | 0.01 |
Total from operations (in USD per share) | 0.46 | 0.16 |
Distributions to common stockholders from |  |  |
Net investment income (in USD per share) | (0.25) | (0.21) |
Return of capital (in USD per share) | 0 | 0 |
Total distributions (in dollar per share) | (0.25) | (0.21) |
Anti-dilutive effect of common stock issuance (in USD per share) | 0 | 0.03 |
Total capital share transactions (in USD per share) | 0 | 0.03 |
Other, net (in USD per share) | 0.01 | 0 |
Net asset value at end of period (in USD per share) | 9.61 | 9.06 |
Per common share market value at beginning of period (in USD per share) | 9.64 | 8.49 |
Per common share market value at end of period (in USD per share) | $ 10.70 | $ 9.62 |
Total return | 13.74% | 15.77% |
Common stock outstanding at end of period (in shares) | 43,508,897 | 35,814,602 | 43,508,897
Statement of Assets and Liabilities Data: |  |  |
Net assets at end of period | $ 417,928 | $ 324,326 |
Average net assets | 412,965 | 326,934 |
Senior Securities Data: |  |  |
Borrowings under line of credit, at cost | 85,000 | 108,400 |
Notes payable | $ 257,000 | $ 200,000 |
Ratios/Supplemental Data: |  |  |
Ratio of net expenses to average net assets – annualized | 10.93% | 12.93% |
Ratio of net investment income to average net assets – annualized | 11.56% | 10.68% |
Ratio of expenses to average net assets - annualized | 14.57% | 15.79% |
Ratio of net investment income (loss) to average net assets – annualized | 7.99% | 7.87% |

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