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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Research and development credit	$ 4,639	$ 4,929
Unrecognized Tax Benefits	0
Capitalized Research And Experimental	3,893	$ 1,916
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Deferred Tax Assets, Net	0
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	42,940
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	16,489
Research and development credit	2,887
State and Local Jurisdiction [Member]
Research and development credit	375
State and Local Jurisdiction [Member] | CALIFORNIA [Member] | Internal Revenue Service (IRS) [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 5,288

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