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SHAREHOLDERS' EQUITY (Details 3) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Shares under Option      
Balance at the beginning of the period (in shares) 811,484 787,673 875,039
Granted (in shares) 138,120 104,145  
Exercised (in shares) (192,949) (59,334)  
Canceled (in shares) (51,496) (21,000) (87,366)
Balance at the end of the period (in shares) 705,159 811,484 787,673
Weighted Average exercise price      
Balance at the beginning of the period (in dollars per share) $ 3.97 $ 3.63 $ 3.69
Granted (in dollars per share) $ 7.13 $ 6.07  
Exercised (in dollars per share) $ 4.20 $ 3.06  
Canceled (in dollars per share) $ 8.94 $ 4.10 $ 4.27
Balance at the end of the period (in dollars per share) $ 4.16 $ 3.97 $ 3.63