DISTRIBUTIONS TO COMMON STOCKHOLDERS - Adjustments for Book-tax Differences to Reflect Tax Character (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024
Equity [Abstract]
Undistributed net investment income	$ (428)	$ (1,299)
Accumulated net realized gain (loss)	537	1,310
Capital in excess of par value	$ (109)	$ (11)