Composition of Certain Balance Sheet Accounts - Summary of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Allowance For Credit Loss [Abstract]
Beginning balance	$ 1,674	$ 1,074	$ 1,397	$ 1,109
Provision	234	98	511	63
Bad debt write-offs	(101)		(101)
Ending balance	$ 1,807	$ 1,172	$ 1,807	$ 1,172