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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 15,059 $ 14,890
Less: Accumulated depreciation (9,891) (9,606)
Total property, plant and equipment, net 5,168 5,284
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 6 5
Building [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 1,607 1,574
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 10,645 10,578
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 449 447
Computer Hardware And Software [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 1,283 1,261
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 677 677
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 392 $ 348