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Goodwill and Other Intangible Assets, Net (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]    
Cost $ 3,372 $ 3,372
Accumulated amortization 3,234 3,177
Amortized cost $ 138 195
Brand name [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted average amortization period 4 years 1 month 6 days  
Cost $ 670 670
Accumulated amortization $ 670 670
Customer list [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted average amortization period 2 years 6 months  
Cost $ 2,450 2,450
Accumulated amortization $ 2,450 2,450
Software [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted average amortization period [1] 3 years  
Cost [1] $ 111 111
Accumulated amortization $ 74 37
Customer relationship [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted average amortization period [1] 7 years  
Cost [1] $ 141 141
Accumulated amortization $ 40 $ 20
[1] See Note 3.