Quarterly report pursuant to Section 13 or 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
Apr. 30, 2021
USD ($)
Accounts Notes And Loans Receivable [Line Items]  
Unbilled receivables, amount $ 14,262
Unbilled receivables,percentage 100.00%
1 year or less [Member]  
Accounts Notes And Loans Receivable [Line Items]  
Unbilled receivables, amount $ 8,420
Unbilled receivables,percentage 59.00%
1-2 years [Member]  
Accounts Notes And Loans Receivable [Line Items]  
Unbilled receivables, amount $ 4,623
Unbilled receivables,percentage 32.00%
2-5 years [Member]  
Accounts Notes And Loans Receivable [Line Items]  
Unbilled receivables, amount $ 1,219
Unbilled receivables,percentage 9.00%