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FINANCIAL INCOME (EXPENSES), NET (Tables)
 12 Months Ended
Dec. 31, 2018
Nonoperating Income (Expense) [Abstract]  
Schedule of Financial Income (Expenses), Net
   
Year ended
December 31,
  
   
2016
    
2017
    
2018
  
                   
Bank charges
  
$
(226
)
  
$
(310
)
  
$
(310
)
Income (expense) related to hedging activity
    
748
      
(7,101
)
    
1,434
  
Amortization of debt discount and issuance costs
    
-
      
-
      
(10,004
)
Exchange rate income (loss)
    
(1,122
)
    
1,214
      
(3,521
)
                         
Total income (expenses)
    
(600
)
    
(6,197
)
    
(12,401
)
                         
Interest income
    
847
      
1,182
      
9,607
  
                         
Total financial income (expenses), net
  
$
247
    
$
(5,015
)
  
$
(2,794
)