Supplemental Balance Sheet Information - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
Other Liabilities Disclosure [Abstract]
Deferred consideration	$ 4,235	$ 5,106
Contingent consideration	826	817
Unrecognized tax benefits	2,359	2,538
Operating lease liabilities	4,104	3,188
Other long-term liabilities	$ 11,524	$ 11,649