Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Detail)

v3.20.2
Significant Accounting Policies - Additional Information (Detail)
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2020
USD ($)
Customer
Jul. 31, 2019
Customer
Jul. 31, 2021
USD ($)
Jul. 31, 2020
USD ($)
Customer
Jul. 31, 2019
USD ($)
Customer
Jan. 31, 2020
USD ($)
Customer
Significant Accounting Policies [Line Items]            
Accumulated goodwill impairment charges     $ 54,800,000      
Impairment costs       $ 0   $ 0
Deferred capitalized commission costs $ 862,000     862,000   $ 958,000
Amortization expense       $ 218,000 $ 59,000  
Maximum [Member]            
Significant Accounting Policies [Line Items]            
Contractual customer payment terms for goods or service.       1 year    
COVID-19 [Member]            
Significant Accounting Policies [Line Items]            
Goodwill impairment     $ 0      
Customer Concentration Risk [Member] | Total Revenue [Member]            
Significant Accounting Policies [Line Items]            
Number of customers accounted | Customer 2 2   1 1  
Customer Concentration Risk [Member] | Total Revenue [Member] | Customer One [Member]            
Significant Accounting Policies [Line Items]            
Concentration risk percentage 22.00% 20.00%   18.00% 14.00%  
Customer Concentration Risk [Member] | Total Revenue [Member] | Customer Two [Member]            
Significant Accounting Policies [Line Items]            
Concentration risk percentage 11.00% 10.00%        
Credit Concentration Risk [Member] | Accounts Receivable [Member]            
Significant Accounting Policies [Line Items]            
Number of customers accounted | Customer       2   2
Credit Concentration Risk [Member] | Accounts Receivable [Member] | Customer One [Member]            
Significant Accounting Policies [Line Items]            
Concentration risk percentage       29.00%   16.00%
Credit Concentration Risk [Member] | Accounts Receivable [Member] | Customer Two [Member]            
Significant Accounting Policies [Line Items]            
Concentration risk percentage       17.00%   10.00%