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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

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- Definition

Line of credit facility amendment costs.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of cumulative increase (decrease) in investment from unrealized gain (loss) when value exceeds (is less than) cost for federal income tax purpose.

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Amount of unrealized gain (loss) on investment.

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