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 9 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Earnings Per Share [Abstract]        
Numerator: basic and diluted net increase (decrease) in net assets resulting from operations per common share $ 11,884 $ (5,599) $ 29,568 $ 14,807
Denominator: basic weighted average common share (in shares) 37,680,465 34,304,371 36,492,168 34,304,371
Denominator: diluted weighted average common share (in shares) 37,680,465 34,304,371 36,492,168 34,304,371
Basic net increase (decrease) in net assets resulting from operations (in USD per share) $ 0.32 $ (0.16) $ 0.81 $ 0.43
Diluted net increase (decrease) in net assets resulting from operations (in USD per share) $ 0.32 $ (0.16) $ 0.81 $ 0.43