Annual report pursuant to Section 13 and 15(d)

Accounts Receivables, Contract Assets, and Contract Liabilities - Schedule of Unbilled Receivables Expected to be Billed in Future (Detail)

v3.21.1
Accounts Receivables, Contract Assets, and Contract Liabilities - Schedule of Unbilled Receivables Expected to be Billed in Future (Detail)
$ in Thousands
Jan. 31, 2021
USD ($)
Accounts Notes And Loans Receivable [Line Items]  
Unbilled receivables, amount $ 15,699
Unbilled receivables,percentage 100.00%
1 year or less [Member]  
Accounts Notes And Loans Receivable [Line Items]  
Unbilled receivables, amount $ 9,359
Unbilled receivables,percentage 60.00%
1-2 years [Member]  
Accounts Notes And Loans Receivable [Line Items]  
Unbilled receivables, amount $ 4,943
Unbilled receivables,percentage 31.00%
2-5 years [Member]  
Accounts Notes And Loans Receivable [Line Items]  
Unbilled receivables, amount $ 1,397
Unbilled receivables,percentage 9.00%