Fair Value Measurements - Fair Value of Assets Measured on Recurring Basis (Details) - Recurring - Money market funds - USD ($) $ in Thousands |
Oct. 31, 2020 |
Feb. 01, 2020 |
|---|---|---|
| Level 1 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Money market funds | $ 82,027 | $ 188,182 |
| Level 2 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Money market funds | 0 | 0 |
| Level 3 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Money market funds | $ 0 | $ 0 |