Fair Value Measurements (Details) - USD ($)	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Fair Value Measurements [Line Items]
Unrealized gain (loss)	$ 10,727,490	$ 5,705,864	$ 31,941,213
Transferred out of level 3	7,900,000	23,100,000
Transferred into level 3	0	0
Level 3 [Member]
Fair Value Measurements [Line Items]
Unrealized gain (loss)	5,307,000	(1,201,000)
Investments [Member] \| Level 3 [Member]
Fair Value Measurements [Line Items]
Unrealized gain (loss)	$ (5,700,000)	$ 2,100,000

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 transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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Amount of unrealized gain (loss) on investment.

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