Cash and Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Apr. 28, 2018	Jan. 27, 2018	Apr. 29, 2017	Jan. 28, 2017
Cash and Cash Equivalents [Abstract]
Cash and equivalents	$ 57,946	$ 84,029
Restricted cash included in:
Other current assets	900	900
Other assets (long-term)	5,253	5,253
Total cash and equivalents and restricted cash	$ 64,099	$ 90,182	$ 24,765	$ 34,899