Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Income Tax Disclosure [Line Items]
Income tax (expense) benefit	$ (62,000)	$ 165,000
U.S. federal statutory tax rate	21.00%
Valuation allowance percentage	50.00%
Unrecognized tax benefits excluding interest and penalties that would impact effective tax rate	$ 3,700,000		$ 3,100,000
Undistributed earnings in foreign subsidiaries	0		$ 0
Maximum [Member]
Income Tax Disclosure [Line Items]
Discrete tax benefits related to stock-based compensation awards	$ 100,000	$ 100,000