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Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Cost: $ 24,277 $ 23,869
Accumulated depreciation: 21,205 20,401
Depreciated cost 3,072 3,468
Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Cost: 981 918
Accumulated depreciation: 470 429
Computers and peripheral equipment [Member]    
Property, Plant and Equipment [Line Items]    
Cost: 15,221 14,842
Accumulated depreciation: 14,528 14,194
Office furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Cost: 3,774 3,778
Accumulated depreciation: 2,699 2,471
Motor vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Cost: 1,217 1,237
Accumulated depreciation: 564 447
Software [Member]    
Property, Plant and Equipment [Line Items]    
Cost: 3,084 3,094
Accumulated depreciation: $ 2,944 $ 2,860