Business Combinations - Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 29, 2017	Jul. 29, 2017	Jan. 28, 2017
Restructuring Cost and Reserve [Line Items]
Total Restructuring costs identified	$ 7	$ (121)
Hi-Tech
Restructuring Cost and Reserve [Line Items]
Contract termination costs	254	254	$ 386
Leases, net of sublease	1,470	1,470	1,920
Severance costs	607	607	1,270
Service costs	42	42	206
Total restructuring costs identified	$ 2,373	2,373	$ 3,782
Contract termination costs		(132)
Leases, net of sublease		(450)
Severance costs		(663)
Service costs		(164)
Total Restructuring costs identified		$ (1,409)