Supplemental Balance Sheet Information - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Other Liabilities Disclosure [Abstract]
Deferred consideration	$ 3,447	$ 4,260
Contingent consideration		829
Unrecognized tax benefits	3,032	1,841
Operating lease liabilities	3,060	3,843
Other long-term liabilities	$ 9,539	$ 10,773