Income Taxes - Summary of Deferred Tax Asset Valuation Allowance (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jan. 31, 2021 |
Jan. 31, 2020 |
|
| Valuation Allowance [Abstract] | ||
| Beginning Balance | $ 28,214 | $ 16,598 |
| Charged to Costs & Expenses | 13,635 | 11,616 |
| Ending Balance | $ 41,849 | $ 28,214 |