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Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Summary of property and equipment    
Property and equipment, Gross $ 3,868 $ 5,339
Less accumulated depreciation (3,207) (4,429)
Property and equipment, Net 661 910
Building [Member]    
Summary of property and equipment    
Property and equipment, Gross 1,851 1,997
Computer equipment [Member]    
Summary of property and equipment    
Property and equipment, Gross 790 920
Dies [Member]    
Summary of property and equipment    
Property and equipment, Gross 553 566
Furniture and fixtures [Member]    
Summary of property and equipment    
Property and equipment, Gross 313 322
Machinery and equipment [Member]    
Summary of property and equipment    
Property and equipment, Gross 299 1,466
Transportation equipment [Member]    
Summary of property and equipment    
Property and equipment, Gross $ 62 $ 68