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7. Property, Plant and Equipment (Details) - Property, Plant and Equipment - USD ($)
$ in Thousands
3 Months Ended
May. 01, 2016
Jan. 31, 2016
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 58,622 $ 48,594
Less accumulated depreciation 33,276 27,739
Total depreciable property, net 25,346 20,855
Land 1,067 1,067
Construction-in-progress 1,779 846
Property, plant and equipment, net 28,192 22,768
Building and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 22,946 22,777
Computer Software and Hardware [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 18,460 16,137
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 5,302 4,864
Property, Plant and Equipment, Depreciable Lives 10  
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 9,085 2,817
Property, Plant and Equipment, Depreciable Lives 5  
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 2,274 1,453
Property, Plant and Equipment, Other Types [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 555 $ 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