DISTRIBUTIONS TO COMMON STOCKHOLDERS - Adjustments for Book-tax Differences to Reflect Tax Character (Details)

v3.23.1

DISTRIBUTIONS TO COMMON STOCKHOLDERS - Adjustments for Book-tax Differences to Reflect Tax Character (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2023	Sep. 30, 2022
Retained Earnings
Investment Company, Changes in Net Assets [Line Items]
Tax reclassification, increase (decrease)	$ 271	$ (5,606)
Accumulated Long-term Capital Gains
Investment Company, Changes in Net Assets [Line Items]
Tax reclassification, increase (decrease)	(271)	7,013
Additional Paid-in Capital
Investment Company, Changes in Net Assets [Line Items]
Tax reclassification, increase (decrease)	$ 0	$ (1,407)