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Property, Plant and Equipment (Detail) - USD ($)
$ in Thousands
12 Months Ended
May 01, 2016
Jan. 31, 2016
Nov. 01, 2015
Aug. 02, 2015
May 03, 2015
Feb. 01, 2015
Nov. 02, 2014
Aug. 03, 2014
Property, Plant and Equipment [Line Items]                
land and improvements $ 836       $ 741      
buildings and improvements 16,126       15,312      
leasehold improvements 1,340       1,320      
machinery and equipment 64,114       57,286      
office furniture and equipment 8,212       7,340      
capital projects in progress 2,896       1,966      
property, plant and equipment, gross 93,524       83,965      
accumulated depreciation and amortization (53,551)       (47,887)      
property, plant and equipment, net $ 39,973 $ 38,157 $ 38,319 $ 37,480 $ 36,078 $ 35,269 $ 33,204 $ 31,891
land and improvements [Member] | Minimum [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives 0 years              
land and improvements [Member] | Maximum [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives 10 years              
buildings and improvements [Member] | Minimum [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives 7 years              
buildings and improvements [Member] | Maximum [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives 40 years              
leasehold improvements [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives Shorter of life of lease or useful life.              
machinery and equipment [Member] | Minimum [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives 3 years              
machinery and equipment [Member] | Maximum [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives 12 years              
office furniture and equipment [Member] | Minimum [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives 3 years              
office furniture and equipment [Member] | Maximum [Member]                
Property, Plant and Equipment [Line Items]                
depreciable lives 10 years