Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands	Oct. 28, 2017	Jan. 31, 2017
Inventory Disclosure [Abstract]
Materials and Supplies	$ 13,264	$ 11,865
Work-In-Process	1,475	1,216
Finished Goods	13,730	10,270
Inventory, Gross	28,469	23,351
Inventory Reserve	(4,811)	(3,845)
Inventories	$ 23,658	$ 19,506