Supplemental Balance Sheet Information - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Other Liabilities Disclosure [Abstract]
Deferred consideration	$ 1,653	$ 1,629
Unrecognized tax benefits	2,951	3,332
Operating lease liabilities, less current portion	$ 2,915	$ 2,974
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other long-term liabilities	Other long-term liabilities
Other	$ 266	$ 125
Other long-term liabilities	$ 7,785	$ 8,060