Quarterly report pursuant to Section 13 or 15(d)

Leases - Schedule of Financial Statement Classification of Lease Expenses Reported in Condensed Consolidated Statements of Operations (Detail)

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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, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Lessee Lease Description [Line Items]        
Total lease cost $ 392 $ 77 $ 703 $ 207
Cost of sales        
Lessee Lease Description [Line Items]        
Operating lease cost 196 56 340 143
Finance lease cost 1 3 4 14
Short-term lease cost 107   183  
Selling, General And Administrative Expenses [Member]        
Lessee Lease Description [Line Items]        
Operating lease cost 86 16 170 44
Finance lease cost $ 2 $ 2 $ 6 $ 6