Fair Value Measurements - Schedule of Fair Value, Assets Measured on Recurring Basis (Details) - Recurring - Money market funds - USD ($) $ in Thousands	Aug. 01, 2020	Feb. 01, 2020
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 173,071	$ 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