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SHAREHOLDERS' EQUITY (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2008
Dec. 31, 2007
Outstanding- Number of options 1,355,879      
Granted - Number of options 0   100,000 825,000
Exercised - Number of options (136,708)      
Forfeited - Number of options (61,786)      
Outstanding- Number of options 1,157,385 1,355,879    
Exercisable - Number of options 791,797      
Vested and expected to vest - Number of options 1,117,531      
Outstanding - Weighted average exercise price $ 2.31      
Granted - Weighted average exercise price $ 0      
Exercised - Weighted average exercise price $ 2.53      
Forfeited - Weighted average exercise price $ 2.13      
Outstanding - Weighted average exercise price $ 2.74 $ 2.31    
Exercisable - Weighted average exercise price $ 2.54      
Vested and expected to vest - Weighted average exercise price $ 2.7      
Outstanding - Weighted average remaining contractual term (in years) 5 years 10 months 13 days 6 years 5 months 16 days    
Exercisable - Weighted average remaining contractual term (in years) 4 years 10 months 10 days      
Vested and expected to vest - Weighted average remaining contractual term (in years) 5 years 9 months 7 days      
Outstanding - Aggregate intrinsic value $ 3,416      
Outstanding - Aggregate intrinsic value 2,298 3,416    
Exercisable - Aggregate intrinsic value 1,738      
Vested and expected to vest - Aggregate intrinsic value $ 2,261