NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS PER WEIGHTED AVERAGE COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Numerator: basic and diluted net increase (decrease) in net assets resulting from operations per common share	$ 20,001	$ 5,698
Denominator: basic weighted average common share (in shares)	43,508,897	35,207,208
Denominator: diluted weighted average common share (in shares)	43,508,897	35,207,208
Basic net increase (decrease) in net assets resulting from operations (in USD per share)	$ 0.46	$ 0.16
Diluted net increase (decrease) in net assets resulting from operations (in USD per share)	$ 0.46	$ 0.16