Quarterly report pursuant to Section 13 or 15(d)

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

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NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS PER WEIGHTED AVERAGE COMMON SHARE (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Earnings Per Share [Abstract]        
Numerator: basic and diluted net increase (decrease) in net assets resulting from operations per common share $ 11,986 $ 8,303 $ 17,684 $ 20,406
Denominator: basic weighted average common share (in shares) 36,604,182 34,304,371 35,898,020 34,304,371
Denominator: diluted weighted average common share (in shares) 36,604,182 34,304,371 35,898,020 34,304,371
Basic net increase (decrease) in net assets resulting from operations (in USD per share) $ 0.33 $ 0.24 $ 0.49 $ 0.59
Diluted net increase (decrease) in net assets resulting from operations (in USD per share) $ 0.33 $ 0.24 $ 0.49 $ 0.59