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Property, Plant and Equipment, Net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 15,250 $ 13,505  
Accumulated depreciation (11,580) (9,384)  
Property, Plant and equipment, net 3,670 4,121  
Depreciation 2,190 1,911 $ 1,616
Machinery and equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment 12,150 10,531  
Office Furniture and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment 725 665  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 2,375 $ 2,309