Summary of Significant Accounting Policies and Supplemental Balance Sheet Information - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Other Liabilities Disclosure [Abstract]
Deferred consideration	$ 1,754	$ 4,260
Contingent consideration		829
Unrecognized tax benefits	3,332	1,841
Operating lease liabilities	$ 2,974	$ 3,843
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other long-term liabilities	Other long-term liabilities
Other long-term liabilities	$ 8,060	$ 10,773