Quarterly report [Sections 13 or 15(d)]

FINANCIAL HIGHLIGHTS (Details)

v3.26.1
FINANCIAL HIGHLIGHTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Mar. 31, 2026
 [1]
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
 [1]
Dec. 31, 2024
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Per Common Share Data:                  
Net asset value at beginning of period (in USD per share)     $ 21.34     $ 21.18 $ 21.34 $ 21.18  
Income from operations                  
Net investment income, basic (in USD per share) $ 0.49     $ 0.50     1.51 1.50  
Net realized and unrealized gain (loss) on investments (in USD per share)             0.16 0.43  
Net realized and unrealized gain (loss) on other (in USD per share)             (0.08) 0  
Preferred stock dividends (in USD per share)             (0.08) 0  
Total from operations (in USD per share)             1.51 1.93  
Distributions to common stockholders from                  
Net investment income (in USD per share) (0.45) [1] $ (0.45) (0.42) [1] (0.49) [1] $ (0.50) (0.50) [1] (1.32) (1.49)  
Realized gains (in USD per share) (0.00) $ (0.00) (0.03) [1] (0.00) $ (0.00) (0.40) [1] (0.03) (0.40)  
Total distributions (in dollar per share)             (1.35) (1.89)  
Anti-dilutive effect of common stock issuance                  
Anti-dilutive effect of common stock issuance (in USD per share)             0 0.02  
Total capital share transactions (in USD per share)             0 0.02  
Other, net (in USD per share)             0 0.01  
Net asset value at end of period (in USD per share) 21.50     21.25     21.50 21.25  
Per common share market value at beginning of period (in USD per share)     $ 21.87     $ 24.05 21.87 24.05  
Per common share market value at end of period (in USD per share) $ 19.42     $ 26.97     $ 19.42 $ 26.97  
Total return             (4.82%) 20.16%  
Common stock outstanding at end of period (in shares) 22,593,069     22,329,852     22,593,069 22,329,852 22,593,069
Statement of Assets and Liabilities Data:                  
Net assets at end of period $ 485,717     $ 474,454     $ 485,717 $ 474,454 $ 482,035
Average net assets             482,693 478,420  
Senior Securities Data:                  
Borrowings under line of credit, at cost 177,500     27,500     177,500 27,500  
Preferred Stock 50,323     16,196     50,323 16,196  
Notes Payable $ 259,500     $ 257,000     $ 259,500 $ 257,000  
Ratios/Supplemental Data:                  
Ratio of net expenses to average net assets – annualized             11.30% 8.76%  
Ratio of net investment income to average net assets – annualized             9.42% 9.41%  
Portfolio Turnover Ratio             15.54% 35.18%  
Ratio of expenses to average net assets - annualized             14.45% 12.38%  
Ratio of net investment income (loss) to average net assets – annualized             6.32% 5.84%  
[1] Refer to Note 9 – Distributions to Common Stockholders in the accompanying Notes to Consolidated Financial Statements for additional information.