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SHAREHOLDERS' EQUITY (Tables)
12 Months Ended
Dec. 31, 2017
Employees and Directors [Member]  
Schedule of Share-based Compensation Arrangements by Grantee [Line Items]  
Schedule Of Option Activity
Transactions related to the grant of options to employees and directors under the above plans during the year ended December 31, 2017, were as follows:

   
Number of options
   
Weighted average exercise price
   
Weighted average remaining contractual life
   
Aggregate intrinsic value
 
         
$
   
Years
   
$
 
                         
Options outstanding at beginning of year
   
7,604,651
     
5.17
     
6.27
     
6,535
 
Options granted
   
1,842,900
     
2.98
                 
Options exercised
   
161,536
     
1.25
                 
Options forfeited
   
637,432
     
6.01
                 
Options expired
   
-
                         
                                 
Options outstanding at end of year
   
8,648,583
     
4.72
     
6.03
     
1,364
 
                                 
Exercisable at end of year
   
5,542,991
     
4.86
     
4.33
     
1,364
 
Schedule of Stock-Based Compensation Expenses
The stock-based compensation expenses are included as follows in the expense categories:

   
Year ended
December 31,
 
   
2017
   
2016
   
2015
 
                   
Cost of revenue
 
$
-
   
$
23
   
$
110
 
Research and development expenses
   
1,331
     
1,522
     
2,157
 
Marketing and business development expenses
   
187
     
147
     
255
 
General and administrative expenses
   
1,115
     
1,392
     
1,251
 
                         
   
$
2,633
   
$
3,084
   
$
3,773
 
Non-employees [Member]  
Schedule of Share-based Compensation Arrangements by Grantee [Line Items]  
Schedule Of Option Activity
Options to non-employees:
 
   
Year ended
December 31, 2017
 
   
Number of options
   
Weighted average exercise price
   
Weighted average remaining contractual life
 
         
$
   
Years
 
                   
Options outstanding at beginning of year
   
736,820
     
6.31
     
4.38
 
Options granted
   
170,000
     
3.31
         
Options exercised
   
-
     
-
         
Options expired
   
103,820
     
5.46
         
Options forfeited
   
10,000
     
4.65
         
                         
Options outstanding at end of year
   
793,000
     
5.80
     
4.39
 
                         
Exercisable at end of year
   
345,500
     
6.79
     
4.12
 
Schedule Of weighted-average assumptions for general options granted
The Company used the following weighted-average assumptions for general options granted to non-employees:
 
   
Year ended
December 31,
 
   
2017
   
2016
   
2015
 
                   
Volatility
   
52.09
%
   
49.92
%
   
51
%
Risk-free interest rate
   
2.21
%
   
1.98
%
   
1.85
%
Dividend yield
   
0
%
   
0
%
   
0
%
Expected life (years)
   
5.23
     
5.29
     
5.6