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 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Sep. 30, 2023
Debt Instrument [Line Items]          
Line of credit outstanding, at cost $ 117,200   $ 117,200   $ 47,800
Credit Facility | Revolving Line of Credit | Line of Credit          
Debt Instrument [Line Items]          
Commitment amount 243,659   243,659   223,659
Line of credit outstanding, at cost 117,200   117,200   47,800
Availability 103,340   103,340   $ 169,060
Weighted average borrowings outstanding, at cost $ 90,258 $ 125,756 $ 69,306 $ 127,427  
Weighted average interest rate 9.90% 8.00% 10.90% 7.50%  
Commitment (unused) fees incurred $ 313 $ 185 $ 750 $ 341