Other Charges, Net - Summary of Net Charges Incurred in Proxy Solicitation and Proposed Merger and Management and Organizational Changes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Proxy Solicitation and Proposed Merger
Proxy solicitation	$ 1,256		$ 2,142
Proposed merger		$ (165)		$ 649
Total proxy solicitation and proposed merger	1,256	(165)	2,142	649
Management and Organizational Changes
Severance and related benefits	633	(6)	885	(3)
Consulting fees	34		46
Total management and organizational changes	667	(6)	931	(3)
Total other charges, net	$ 1,923	$ (171)	$ 3,073	$ 646