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% | |||