v3.23.3
Share Data and Net Assets - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Earnings (loss) per common share — basic and diluted:      
Net increase (decrease) in net assets resulting from operations $ 117,331 $ 29,223 $ 237,260
Weighted average common shares outstanding - basic (shares) [1] 72,119 60,727 54,039
Weighted average common shares outstanding - diluted (shares) [1] 72,119 60,727 54,039
Earnings (loss) per common share - basic (dollars per share) [1] $ 1.63 $ 0.48 $ 4.39
Earnings (loss) per common share - diluted (dollars per share) [1] $ 1.63 $ 0.48 $ 4.39
[1] As discussed in Note 2, the Company completed a 1-for-3 reverse stock split on January 20, 2023, effective as of the commencement of trading on January 23, 2023. The weighted average common shares outstanding and per share information reflect the reverse stock split on a retroactive basis.