Supplemental Balance Sheet Information - Schedule of Accrued Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Accrued Liabilities, Current [Abstract]
Accrued professional fees	$ 200	$ 178
Accrued clinical study expense	405	1,056
Accrued purchases	1,275	1,142
Deferred consideration	2,627	2,661
Operating lease liability, current portion	997	872
Other	305	535
Total accrued other liabilities	$ 5,809	$ 6,444