CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (2,774)	$ (2,509)	$ (3,916)	$ 1,532
Foreign currency translation adjustments		(1)	2	1
Comprehensive income (loss)	$ (2,774)	$ (2,510)	$ (3,914)	$ 1,533