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Borrowings - General, Narrative (Details) - USD ($)
Sep. 30, 2025
Sep. 30, 2024
Jun. 09, 2018
Jun. 08, 2018
Nov. 05, 2014
Debt Disclosure [Abstract]          
Minimum asset coverage ratio     150.00% 200.00% 150.00%
Borrowings allowable per dollar of equity     $ 2    
Debt to equity ratio, maximum         1.65
Maximum secured debt ratio         0.70
Asset coverage ratio 179.09% 179.18%