Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021
Income Tax Contingency [Line Items]
Income tax expense	$ 20,000	$ 680,000	$ 840,000	$ 1,250,000
Benefit related to reversal of previously recorded uncertain tax positions				$ 300,000
Unrecognized tax benefits that would impact effective tax rate	1,000,000.0		1,000,000.0		$ 900,000
Accrual for potential interest and penalties	$ 700,000		$ 700,000		$ 600,000