Income Taxes - Reconciliation of Unrecognized Tax Position (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2020 |
Jan. 31, 2019 |
Jan. 31, 2018 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Beginning Balance | $ 2,778 | $ 1,976 | $ 1,205 |
| Increases related to current years’ tax positions | 5,328 | 802 | 771 |
| Ending Balance | $ 8,106 | $ 2,778 | $ 1,976 |