Quarterly report [Sections 13 or 15(d)]

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

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DISTRIBUTIONS TO COMMON STOCKHOLDERS - Schedule of Adjustments for Book-tax Differences to Reflect Tax Character (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Mar. 31, 2026
Sep. 30, 2025
Equity [Abstract]    
Undistributed net investment income $ (2,519) $ (946)
Accumulated net realized gain (loss) 2,522 1,053
Capital in excess of par value $ (3) $ (107)