Summary of Significant Accounting Policies and Select Balance Sheet Information - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Other Liabilities Disclosure [Abstract]
Deferred consideration	$ 4,260	$ 5,106
Contingent consideration	829	817
Unrecognized tax benefits	1,841	2,538
Operating lease liabilities	$ 3,843	$ 3,188
Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List	Other long-term liabilities	Other long-term liabilities
Other long-term liabilities	$ 10,773	$ 11,649