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Property, Plant and Equipment Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 85,856 $ 83,364
Accumulated depreciation and amortization, (54,949) (47,877)
Property, plant and equipment, less accumulated depreciation and amortization 30,907 35,487
Land    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 2,721 2,692
Buildings and improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 18,981 18,343
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 22,837 22,558
Capitalized software    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 21,371 19,710
McCook facility    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 12,961 12,961
Accumulated depreciation and amortization, (5,900)  
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 5,714 5,693
Capital leases    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 534 563
Accumulated depreciation and amortization, (300)  
Vehicles    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 166 163
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 571 $ 681