SHAREHOLDERS' EQUITY (Tables)
 12 Months Ended
Dec. 31, 2014
SHAREHOLDERS' EQUITY [Abstract]  
Summary of share repurchase
ADS     Ordinary shares     Price per ADS
(including brokerage
commission)		     Total
consideration		  
2012   5,955,796       23,823,184       0.89-1.38       7,396  
2013   3,538,100       14,152,399       1.27-1.99       6,638  
2014   2,816,938       11,267,755       1.97       5,550  
      12,310,834       49,243,338               19,584