Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Oct. 28, 2017	Jan. 28, 2017
Level I [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 240	$ 79
Long-term investments	2,726	2,666
Total investments	2,966	2,745
Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Long-term investments	0	0
Total investments	0	0
Level III [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Long-term investments	0	0
Total investments	$ 0	$ 0