Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS - Schedule of Line of Credit Facilities (Details)

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BORROWINGS - Schedule of Line of Credit Facilities (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Sep. 30, 2023
Debt Instrument [Line Items]          
Line of credit outstanding, at cost $ 65,800   $ 65,800   $ 47,800
Credit Facility | Revolving Line of Credit | Line of Credit          
Debt Instrument [Line Items]          
Commitment amount 268,659   268,659   223,659
Line of credit outstanding, at cost 65,800   65,800   47,800
Availability 181,944   181,944   $ 169,060
Weighted average borrowings outstanding, at cost $ 76,843 $ 154,265 $ 71,809 $ 136,373  
Weighted average interest rate 10.50% 8.20% 10.70% 7.70%  
Commitment (unused) fees incurred $ 396 $ 105 $ 1,146 $ 446