Leasing Arrangements - Additional Information (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Remaining lease term	4 years 3 months 18 days	4 years 3 months 18 days
Leases discount rate	3.70%	3.70%
Cost of Sales [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 165	$ 424
Operating Expense [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 330	$ 889