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Employee Retention Credit - Additional Information (Detail) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2021
Jul. 31, 2021
Jun. 30, 2021
Jan. 31, 2021
Cost of Sales [Member]        
Employee Retention Credit Disclosure [Line Items]        
Employee Retention Credit Receivable - cost of revenue $ 1,700,000 $ 1,700,000    
Selling and Marketing Expense [Member]        
Employee Retention Credit Disclosure [Line Items]        
Employee Retention Credit Receivable - selling and marketing 800,000 800,000    
Research and Development Expense [Member]        
Employee Retention Credit Disclosure [Line Items]        
Employee Retention Credit Receivable - research and development 300,000 300,000    
General and Administrative Expense [Member]        
Employee Retention Credit Disclosure [Line Items]        
Employee Retention Credit Receivable - general and administrative expenses 300,000 300,000    
Prepaid Expenses and Other Current Assets [Member]        
Employee Retention Credit Disclosure [Line Items]        
Employee retention credit 3,100,000      
Cares Act [Member]        
Employee Retention Credit Disclosure [Line Items]        
Percentage of refundable tax credit can be claimed of qualified wages     70.00%  
Threshold qualified wages per employee per calendar quarter     $ 10,000  
Maximum threshold employee retention credit per employee per calendar quarter     $ 7,000  
Percentage of reduction of gross Receipts to qualify for employee retention credit       20.00%
Cares Act [Member] | Prepaid Expenses and Other Current Assets [Member]        
Employee Retention Credit Disclosure [Line Items]        
Employee Retention Credit Receivable - cost of revenue $ 3,100,000 $ 3,100,000