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DERIVATIVE INSTRUMENTS (Tables)
6 Months Ended
Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Fair Value of Derivative Contracts
The fair value of derivative contracts in the unaudited consolidated balance sheets at June 30, 2019 and December 31, 2018 were as follows:

   
Other accounts receivable and prepaid expenses
   
Other accounts payable and accrued expenses
 
   
June 30, 2019
 
Derivatives designated as hedging instruments
           
Currency forward contracts
 
$
545
   
$
-
 
Derivatives not designated as hedging instruments
               
Currency forward and option contracts
 
$
54
   
$
139
 
                 
Total derivatives
 
$
599
   
$
139
 

   
Other accounts receivable and prepaid expenses
   
Other accounts payable and accrued expenses
 
   
December 31, 2018
 
Derivatives designated as hedging instruments
           
Currency forward contracts
 
$
3
   
$
587
 
Derivatives not designated as hedging instruments
               
Currency forward and option contracts
 
$
2
   
$
446
 
                 
Total derivatives
 
$
5
   
$
1,033
 
Schedule of Notional Amounts of Outstanding Derivative Contracts
The notional amounts of outstanding derivative contracts in U.S. dollars at June 30, 2019 and December 31, 2018 were as follows:

   
December 31,
2018
   
June 30,
2019
 
Derivatives designated as hedging instruments
           
Currency forward contracts
 
$
37,398
   
$
18,757
 
Derivatives not designated as hedging instruments
               
Currency forward and option contracts
 
$
21,882
   
$
29,209
 
                 
Total derivatives
 
$
59,280
   
$
47,966
Schedule of Derivative Contracts on Unaudited Consolidated Statements of Operations
The effect of derivative contracts on the unaudited consolidated statements of operations for the six months ended June 30, 2019 and 2018 was as follows:

   
Six months ended June 30,
 
   
2018
   
2019
 
             
Operating income (expenses)
 
$
(262
)
 
$
85
 
Financial income (expenses)
 
$
1,076
   
$
(559)