Quarterly report pursuant to Section 13 or 15(d)

FINANCIAL HIGHLIGHTS (Details)

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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%