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Commitments and Contingencies (Details Textual)
$ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2016
ILS (₪)
Jan. 31, 2015
USD ($)
Aug. 31, 2009
USD ($)
Aug. 31, 2009
ILS (₪)
Dec. 31, 2017
USD ($)
Squarefeet
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Commitments and Contingencies (Textual)              
Rent expenses         $ 2,729 $ 2,204 $ 2,045
Lease agreement maximum penalties amount         $ 48    
Square feet of space based on lease agreements | Squarefeet         165,646    
Aggregated amount of lease commitment         $ 4,396    
Sought damages in amount ₪ 34,106   $ 13,400 ₪ 52,000,000      
Damages plaintiffs amount   $ 2,400          
Restricted bank deposits         $ 419    
Lease agreements, description         The Group has diverse liability for the lease agreements varying from six months to five years.    
Customer Contracts [Member]              
Commitments and Contingencies (Textual)              
Bank guarantees amount         $ 516