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SHAREHOLDERS' EQUITY (Details 1) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Outstanding- Number of options 1,355,879    
Exercised - Number of options (136,708)    
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    
Exercised - Weighted average exercise price $ 2.53    
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    
Exercised - Aggregate intrinsic value 572 2,197 1,895
Outstanding - Aggregate intrinsic value 2,298 3,416  
Exercisable - Aggregate intrinsic value 1,738    
Vested and expected to vest - Aggregate intrinsic value 2,261    
Performance Shares [Member]
      
Outstanding- Number of options 139,250    
Outstanding- Number of options 139,250 139,250  
Exercisable - Number of options 114,250    
Vested and expected to vest - Number of options 138,905    
Outstanding - Weighted average exercise price $ 1.44    
Outstanding - Weighted average exercise price $ 1.44 $ 1.44  
Exercisable - Weighted average exercise price $ 1.51    
Vested and expected to vest - Weighted average exercise price $ 1.44    
Outstanding - Weighted average remaining contractual term (in years) 5 years 6 months 18 days 6 years 6 months 18 days  
Exercisable - Weighted average remaining contractual term (in years) 5 years 5 months 12 days    
Vested and expected to vest - Weighted average remaining contractual term (in years) 5 years 6 months 18 days    
Outstanding - Aggregate intrinsic value 519    
Outstanding - Aggregate intrinsic value 454 519  
Exercisable - Aggregate intrinsic value 364    
Vested and expected to vest - Aggregate intrinsic value $ 452