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7. Property, Plant and Equipment (Details) - Property, Plant and Equipment - USD ($)
$ in Thousands
9 Months Ended
Oct. 30, 2016
Jan. 31, 2016
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 54,846 $ 48,594
Less accumulated depreciation 30,048 27,739
Total depreciable property, net 24,798 20,855
Land 1,067 1,067
Construction-in-progress 612 846
Property, plant and equipment, net 26,477 22,768
Building and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 23,266 22,777
Computer Software and Hardware [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 17,170 16,137
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 4,949 4,864
Property, Plant and Equipment, Depreciable Lives 10  
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 7,069 2,817
Property, Plant and Equipment, Depreciable Lives 5  
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 1,828 1,453
Property, Plant and Equipment, Other Types [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 564 $ 546
Property, Plant and Equipment, Depreciable Lives 5  
Minimum [Member] | Building and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Depreciable Lives 15  
Minimum [Member] | Computer Software and Hardware [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Depreciable Lives 3  
Minimum [Member] | Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Depreciable Lives 3  
Maximum [Member] | Building and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Depreciable Lives 30  
Maximum [Member] | Computer Software and Hardware [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Depreciable Lives 10  
Maximum [Member] | Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Depreciable Lives 8