Leases - Schedule of Weighted Average Remaining Lease Terms and Discount Rate of Operating Leases (Detail)	Sep. 30, 2022	Sep. 30, 2021
Office and Warehouse Space [Member]
Lessee Lease Description [Line Items]
Weighted average remaining lease term	5 years 4 months 17 days	3 years 1 month 24 days
Office Leases [Member]
Lessee Lease Description [Line Items]
Weighted average discount rate	5.31%	3.05%
Vehicles [Member]
Lessee Lease Description [Line Items]
Weighted average remaining lease term	2 months 26 days	3 months 21 days
Weighted average discount rate	0.58%	0.63%
Office Equipment [Member]
Lessee Lease Description [Line Items]
Weighted average remaining lease term	18 days	0 years
Weighted average discount rate	0.13%	0.04%