Supplemental Balance Sheet Information - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023
Other Liabilities Disclosure [Abstract]
Deferred consideration	$ 1,645	$ 1,629
Unrecognized tax benefits	3,308	3,332
Operating lease liabilities, less current portion	$ 3,180	$ 2,974
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other long-term liabilities	Other long-term liabilities
Other	$ 188	$ 125
Other long-term liabilities	$ 8,321	$ 8,060