Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivables, Contract Assets, and Contract Liabilities - Schedule of Changes in Deferred Revenue (Detail)

v3.21.2
Accounts Receivables, Contract Assets, and Contract Liabilities - Schedule of Changes in Deferred Revenue (Detail) - USD ($)
$ in Thousands
 6 Months Ended
Jul. 31, 2021
Jan. 31, 2021
Deferred Revenue, Current [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Balance $ 4,133 $ 4,737
Decrease (604)  
Deferred Revenue, Long-Term [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Balance 146 $ 657
Decrease $ (511)