v3.26.1
Borrowings (Details)
3 Months Ended 6 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Sep. 30, 2025
USD ($)
Debt Instrument [Line Items]          
Minimum asset coverage ratio required (as a percent) 1.50   1.50    
Outstanding borrowings $ 0   $ 0   $ 0
Borrowings on debt     1,700,000 $ 35,000  
Repayments of long-term lines of credit     1,700,000 35,000  
Outstanding borrowings $ 0   $ 0   0
Revolving Credit Facility | Adviser Revolver          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate (as a percent) 3.50%   3.50%    
Revolving Credit Facility | Adviser Revolver | Line of Credit          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity $ 75,000,000   $ 75,000,000   $ 75,000,000
Borrowings on debt 1,700,000 $ 35,000 1,700,000 35,000  
Repayments of long-term lines of credit 1,700,000 35,000 1,700,000 35,000  
Interest expense $ 2,000 $ 1,000 $ 2,000 $ 1,000