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SHAREHOLDERS' EQUITY (Summary Of Stock Options And RSUs Granted) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Number of options    
Outstanding at beginning of year 6,465,782  
Granted 1,777,875  
Exercised (72,832) (125,000)
Forfeited or expired (680,652)  
Outstanding at end of year 7,490,173 6,465,782
Options exercisable at end of the year 4,021,641  
Vested and expected to vest 6,611,066  
Weighted average exercise price    
Outstanding at beginning of year $ 4.81  
Granted 1.43  
Exercised 1.18  
Forfeited or expired 6.78  
Outstanding at end of year 3.86 $ 4.81
Options exercisable at end of the year 6.01  
Vested and expected to vest $ 4.20  
Weighted-average remaining contractual term    
Outstanding at end of year 4 years 3 months 29 days 4 years 9 months 4 days
Options exercisable at end of the year 3 years 11 months 1 day  
Vested and expected to vest 4 years 3 months 4 days  
Aggregate intrinsic value    
Outstanding at beginning of year $ 88  
Outstanding at end of the year 6,003 $ 88
Options exercisable at end of the year 1,639  
Vested and expected to vest $ 4,842  
Restricted Stock Units RSUs [Member]    
Number of options    
Outstanding at beginning of year 106,768  
Granted  
Exercised (59,233)  
Forfeited or expired  
Outstanding at end of year 47,535 106,768
Vested and expected to vest 43,118  
Aggregate intrinsic value    
Outstanding at beginning of year $ 120  
Outstanding at end of the year 125 $ 120
Vested and expected to vest $ 113