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Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,191 $ 2,167
Less - accumulated depreciation and amortization (2,027) (1,965)
Property and equipment, net 164 202
Computers and electronic equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 1,892 1,848
Office furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 155 155
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 122 146
Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 22 $ 18