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4. Property, Plant and Equipment (Details) - Property, Plant and Equipment (USD $)
In Thousands, unless otherwise specified
Nov. 03, 2013
Feb. 03, 2013
Property, Plant and Equipment [Line Items]    
Depreciable property at cost $ 56,534 $ 54,936
Less accumulated depreciation 36,258 34,559
Total depreciable property, net 20,276 20,377
Land 1,152 1,152
Construction-in-progress 2,166 1,300
Property, plant and equipment, net 23,594 22,829
Building and Building Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Depreciable property at cost 23,957 23,680
Computer Software and Hardware [Member]
   
Property, Plant and Equipment [Line Items]    
Depreciable property at cost 22,446 22,203
Machinery and Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Depreciable property at cost 4,495 3,663
Leasehold Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Depreciable property at cost 2,763 2,698
Furniture and Fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Depreciable property at cost 2,180 1,989
Property, Plant and Equipment, Other Types [Member]
   
Property, Plant and Equipment [Line Items]    
Depreciable property at cost $ 693 $ 703