Quarterly report [Sections 13 or 15(d)]

NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS PER WEIGHTED AVERAGE COMMON SHARE (Details)

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NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS PER WEIGHTED AVERAGE COMMON SHARE (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Earnings Per Share [Abstract]        
Numerator: basic and diluted net increase (decrease) in net assets resulting from operations per common share $ 7,448 $ 19,056 $ 43,220 $ 62,689
Denominator: basic weighted average common share (in shares) [1] 22,329,852 21,754,456 22,323,668 21,754,451
Denominator: diluted weighted average common share (in shares) [1] 22,329,852 21,754,456 22,323,668 21,754,451
Basic net increase (decrease) in net assets resulting from operations (in USD per share) [1] $ 0.33 $ 0.88 $ 1.93 $ 2.88
Diluted net increase (decrease) in net assets resulting from operations (in USD per share) [1] $ 0.33 $ 0.88 $ 1.93 $ 2.88
[1] Per share amounts and weighted average common shares outstanding have been adjusted on a retroactive basis to reflect the Reverse Stock Split effected on April 4, 2024. Refer to Note 2—Summary of Significant Accounting Policies in the accompanying Notes to Consolidated Financial Statements for additional information.