Supplemental Balance Sheet Information - Summary of Other Noncurrent Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Schedule Of Investments [Line Items]
Contract asset	$ 750
Other assets	4,681	$ 3,864
Operating Lease Right-of-Use Assets [Member]
Schedule Of Investments [Line Items]
Other assets	3,233	2,987
Other [Member]
Schedule Of Investments [Line Items]
Other assets	$ 698	$ 877