Annual report pursuant to Section 13 and 15(d)

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

v3.21.1
Accounts Receivables, Contract Assets, and Contract Liabilities - Schedule of Changes in Deferred Revenue (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Deferred Revenue, Current [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Balance $ 5,041 $ 8,014
Increase (decrease) (304) (2,973)
Balance 4,737 5,041
Deferred Revenue, Long-Term [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Balance 1,140 2,642
Increase (decrease) (483) (1,502)
Balance $ 657 $ 1,140