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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross $ 2,001 $ 1,952
Less: Accumulated depreciation 1,849 1,812
Property, plant and equipment, Net 152 140
Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 39 39
Computers and related software [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 1,052 1,035
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 848 817
Office furniture and fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross $ 62 $ 61