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Fair Value of Financial Instruments - Additional Information (Details) - Long-Term Credit Facility - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Sep. 30, 2025
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]      
Line of credit facility amendment costs $ 0.5 $ 0.0  
Net change in unrealized appreciation (depreciation) 0.1 $ 0.1  
Net unrealized appreciation (depreciation) on the Credit Facility $ 0.0   $ 0.0