v3.26.1
Financial Highlights - Summary of Financial Highlights (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Sep. 30, 2025
Investment Company, Financial Highlights [Abstract]          
Net asset value, beginning of period     $ 10.83 $ 11.31  
Net investment income $ 0.26 $ 0.28 0.53 [1] 0.64 [1]  
Net change in realized and unrealized gain (loss) [1],[2]     (0.27) (0.3)  
Net increase (decrease) in net assets resulting from operations 0.29 0.01 0.25 [1],[2] 0.34 [1],[2]  
Distributions to stockholders [1],[3]     (0.62) (0.62)  
Accretive effect of common stock issuance     0 0.04  
Net asset value, end of period [2] 10.47 11.07 10.47 11.07  
Per share market value, end of period $ 8.04 $ 11.19 $ 8.04 $ 11.19  
Total return [4],[5]     (3.11%) 2.20%  
Shares outstanding at end of period 99,217,896 96,417,896 99,217,896 96,417,896 99,217,896
Ratios / Supplemental Data:          
Ratio of operating expenses to average net assets [6],[7]     5.84% 5.88%  
Ratio of debt related expenses to average net assets [7],[8]     9.88% 9.26%  
Ratio of total expenses to average net assets [7],[8]     15.72% 15.14%  
Ratio of net investment income to average net assets [7],[8]     10.08% 11.34%  
Net assets at end of period $ 1,038,657 $ 1,067,131 $ 1,038,657 $ 1,067,131  
Weighted average debt outstanding     $ 1,708,987 $ 1,330,975  
Weighted average debt per share [1]     $ 17.22 $ 15.51  
Asset coverage per unit [9] $ 1,619 $ 1,777 $ 1,619 $ 1,777  
Portfolio turnover rate [5]     22.74% 21.14%  
[1] Based on the weighted average shares outstanding for the respective periods.
[2] Does not foot due to rounding, as applicable.
[3] The tax status of distributions is calculated in accordance with U.S federal income tax regulations, which may differ from amounts determined under GAAP, and reported on Form 1099-DIV each calendar year.
[4] Based on the change in market price per share during the periods and assumes distributions, if any, are reinvested.
[5] Not annualized for periods less than one year.
[6] Total expenses excluding debt-related costs.
[7] Re-occurring investment income and expenses included in these ratios are annualized for periods less than one year.
[8] Includes interest and expenses on debt (annualized) as well as Credit Facility amendment and debt issuance costs, if any, (not annualized).
[9] The asset coverage ratio for a class of senior securities representing indebtedness is calculated on our consolidated total assets, less all liabilities and indebtedness not represented by senior securities, divided by the senior securities representing indebtedness at par (changed from fair value). This asset coverage ratio is multiplied by $1,000 to determine the asset coverage per unit.