Income Taxes - Schedule of Deferred Income Taxes, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Depreciable assets	$ (3,995)	$ (5,106)
Deferred revenue	2,103	2,130
Accruals and reserves	1,615	1,572
Stock-based compensation	2,443	1,997
Impaired strategic investments	1,787	1,782
NOL carryforwards	6,379	4,319
U.S. Federal and state R&D credits	4,465	3,066
Other	848	618
Valuation allowance	(17,672)	(7,253)
Deferred taxes liabilities, net	$ (2,027)
Deferred taxes, net		$ 3,125

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from in-process research and development costs expensed in connection with a business combination.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from investments (excludes investments in subsidiaries and equity method investments).

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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