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Income Taxes - Schedule of Reconciliation of Total Amounts of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Income Tax Uncertainties [Abstract]
Unrecognized tax benefits beginning balance	$ 4,866	$ 4,866
Gross decreases — tax positions in prior period	0	0
Gross increases — tax positions in prior period	0	0
Unrecognized tax benefits ending balance	$ 4,866	$ 4,866

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- Definition

Amount of unrecognized tax benefits.

+ References

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-Topic 740
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-Name Accounting Standards Codification
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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-Topic 740
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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
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