Annual report [Section 13 and 15(d), not S-K Item 405]

INVESTMENTS - Receivables from Portfolio Companies Narrative (Details)

v3.25.3
INVESTMENTS - Receivables from Portfolio Companies Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]    
Uncollectible receivables allowance, minimum required day for uncollectible adjustment 90 days  
Gross receivables from portfolio companies $ 2,400 $ 1,700
Allowance for uncollectible receivables $ 52 $ 75