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