Leases - Schedule of Financial Statement Classification of Lease Expenses Reported in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lessee Lease Description [Line Items]
Total lease cost	$ 362	$ 392	$ 964	$ 703
Cost of sales
Lessee Lease Description [Line Items]
Operating lease cost	292	196	687	340
Finance lease cost	1	1	3	4
Short-term lease cost		107		183
Selling, General and Administrative
Lessee Lease Description [Line Items]
Operating lease cost	41	86	211	170
Finance lease cost	18	$ 2	53	$ 6
Research Development and Engineering
Lessee Lease Description [Line Items]
Operating lease cost	$ 10		$ 10