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COMMON STOCK PURCHASE AND OPTION TO PURCHASE ADDITIONAL SHARES (Details 2) (USD $)
 12 Months Ended 0 Months Ended 17 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Aug. 12, 2011
Repurchase program, August 2011
Dec. 31, 2012
Repurchase program, August 2011
Nov. 30, 2012
Tender offer repurchase program
Jan. 10, 2013
Tender offer repurchase program
Dec. 31, 2012
Tender offer repurchase program
Repurchase program disclosures              
Maximum ordinary shares outstanding under the repurchase program     $ 20,000,000        
Period over which shares can be repurchased     12 months        
Shares repurchased under program       12,524,614      
Value of shares repurchased $ 8,842,000 $ 6,301,000   $ 15,100,000   $ 30,000,000  
Ordinary shares authorized to be repurchased under a tender offer         25,000,000    
Ordinary shares after reverse share split authorized to be repurchased under a tender offer         8,333,333    
Share price (in dollars per share)         $ 1.2    
Share price after reverse share split (in dollars per share)         $ 3.60    
Ordinary shares repurchased           25,000,000  
Ordinary shares after reverse share split             8,333,333