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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Statutory rate	21.00%	21.00%	21.00%
State income taxes, net of federal benefit	3.00%	3.00%	3.00%
Research and development credit	(1.00%)	(2.00%)	(14.00%)
Foreign rate differential	0.00%	0.00%	1.00%
Valuation allowance	0.00%	(3.00%)	(62.00%)
Deferred tax rate differential	0.00%	0.00%	(1.00%)
Non-deductible expenses	1.00%	1.00%	9.00%
Impact of U.S. global intangible taxes and benefits	1.00%	1.00%	3.00%
Stock-based compensation	(1.00%)	0.00%	0.00%
Effective rate	24.00%	21.00%	(40.00%)

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Effective Income Tax Rate Reconciliation Change In Foreign and Domestic Valuation Allowance, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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