DERIVATIVE FINANCIAL INSTRUMENTS (Tables)
 12 Months Ended
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Fair Value of Outstanding Derivative Instruments
The fair value of the Company's outstanding derivative instruments qualified as hedging instruments as of December 31, 2017, 2016 and 2015 is summarized below:

   
Location in
    
Gains (losses) reclassified from
other comprehensive income (loss)
into income (expenses)
  
   
statement
    
Year ended December 31,
  
   
of operations
    
2017
    
2016
    
2015
  
Derivatives in cash flow hedging relationship
                        
                           
Foreign exchange forward contracts
  
Financial expenses
    
$
(15
)
  
$
(18
)
  
$
(10
)
Foreign exchange forward contracts
  
Cost of sales and operating expenses
      
158
      
64
      
(124
)
                                 
           
$
143
    
$
46
    
$
(134
)