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Inventories - Components of Inventories (Detail) - USD ($)
$ in Thousands
Apr. 29, 2017
Jan. 31, 2017
Inventory Disclosure [Abstract]    
Materials and Supplies $ 12,082 $ 11,865
Work-In-Process 1,168 1,216
Finished Goods 11,184 10,270
Inventory, Gross 24,434 23,351
Inventory Reserve (4,098) (3,845)
Inventories $ 20,336 $ 19,506