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Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,376 $ 2,394
Less - accumulated depreciation and amortization 1,878 1,803
Property and equipment, net 498 591
Computers and electronic equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 1,807 1,756
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 263 263
Office furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 152 166
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 146 201
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 8 $ 8