v3.20.2
Summary of Significant Accounting Policies - Concentration of Credit Risk (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Jan. 31, 2020
Channel partner A | Customers | Accounts receivable          
Concentration Risk [Line Items]          
Concentration risk, percentage     7.00%   11.00%
Channel partner A | Channel partner A | Revenue          
Concentration Risk [Line Items]          
Concentration risk, percentage 9.00% 11.00% 9.00% 11.00%  
Channel partner B | Customers | Accounts receivable          
Concentration Risk [Line Items]          
Concentration risk, percentage     6.00%   10.00%
Customer B | Customers | Accounts receivable          
Concentration Risk [Line Items]          
Concentration risk, percentage     4.00%   20.00%