Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands	Apr. 28, 2018	Jan. 31, 2018
Inventory Disclosure [Abstract]
Materials and Supplies	$ 14,690	$ 13,715
Work-in-Progress	1,300	1,404
Finished Goods	16,229	17,210
Inventory, Gross	32,219	32,329
Inventory Reserve	(4,522)	(4,720)
Inventories	$ 27,697	$ 27,609