Fair Value Measurements (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 30, 2021
Fair Value, Inputs, Level 1, 2 and 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, Fair Value Disclosure	$ 27,354	$ 32,484
Fair Value, Inputs, Level 1, 2 and 3 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	35,038	175,113
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, Fair Value Disclosure	27,354	32,484
Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 35,038	$ 175,113