Annual report pursuant to Section 13 and 15(d)

BORROWINGS - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details)

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BORROWINGS - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Debt Instrument [Line Items]    
Credit Facility $ 70,600 $ 47,800
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring    
Debt Instrument [Line Items]    
Credit Facility 70,600 47,800
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Long-Term Debt    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Beginning balance 47,800 141,800
Borrowings 221,200 149,000
Repayments (198,400) (243,000)
Net unrealized (appreciation) depreciation 0 0
Ending balance $ 70,600 $ 47,800