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Investments, Debt and Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Trading, Unrealized Gain (Loss)	$ 0	$ (55)	$ 0	$ 7
Unrealized Gain (Loss) on Investments	(3,764)	$ (1,552)	4,098	$ (3,342)
Marketable Securities [Line Items]
Equity Securities, FV-NI	66,815		66,815		$ 31,639
Debt Securities, Trading	0		0		3,364
Marketable Securities, Current	$ 66,815		$ 66,815		$ 35,003

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