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Derivatives Instruments (Tables)
 12 Months Ended
Dec. 31, 2015
Derivatives Instruments [Abstract]  
Schedule of derivative instruments
   Year ended December 31, 
   2015  2014  2013 
 Derivatives designated as cash flow hedging instruments : 

Line Item in Statement of Operations

         
 Foreign currency derivatives Cost of revenues $32  $          -  $   - 
 Foreign currency derivatives Sales and marketing $60  $  -  $- 
 Foreign currency derivatives General and administrative $32  $-  $- 
 Total expenses   $124  $-  $-