Fair Value of Financial Instruments (Schedule of Financial Instruments Measure at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Feb. 01, 2020	Feb. 02, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents – money market mutual funds	$ 48,080	$ 68,500
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents – money market mutual funds	48,080	68,500
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents – money market mutual funds	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents – money market mutual funds	$ 0	$ 0