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SHARE-BASED COMPENSATION - SHARE OPTION SCHEME (Details)
12 Months Ended
Dec. 31, 2010
USD ($)
tranche
Dec. 31, 2009
shares
Dec. 31, 2018
Y
EquityInstruments
Dec. 31, 2017
EquityInstruments
Dec. 31, 2016
EquityInstruments
Share Option Scheme          
SHARE-BASED COMPENSATION          
Permitted number shares to be issued | shares   22,195,122      
Maximum awards that may granted in one year, as a percent to issued shares (as a percent )   1.00%      
Expiry period (in years)   10 years      
Number of granted tranches of awards | tranche 2        
Number of share options outstanding | EquityInstruments     729,000 729,000 729,000
Vested and exercisable | EquityInstruments     729,000 729,000 729,000
Weighted average remaining contractual life | Y     1.05    
Share Option Scheme, First Tranche          
SHARE-BASED COMPENSATION          
Exercise price (in dollars per share) $ 0.6833        
Estimated fair values 144,000        
Share Option Scheme, Second Tranche          
SHARE-BASED COMPENSATION          
Exercise price (in dollars per share) 0.6833        
Estimated fair values $ 1,509,000        
Vesting on first anniversary of grant date | Share Option Scheme, First Tranche          
SHARE-BASED COMPENSATION          
Vesting percentage (as a percent) 50.00%        
Vesting on first anniversary of grant date | Share Option Scheme, Second Tranche          
SHARE-BASED COMPENSATION          
Vesting percentage (as a percent) 25.00%        
Vesting on second anniversary of grant date | Share Option Scheme, First Tranche          
SHARE-BASED COMPENSATION          
Vesting percentage (as a percent) 50.00%        
Vesting on second anniversary of grant date | Share Option Scheme, Second Tranche          
SHARE-BASED COMPENSATION          
Vesting percentage (as a percent) 25.00%        
Vesting on third anniversary of grant date | Share Option Scheme, Second Tranche          
SHARE-BASED COMPENSATION          
Vesting percentage (as a percent) 25.00%        
Vesting on fourth anniversary of grant date | Share Option Scheme, Second Tranche          
SHARE-BASED COMPENSATION          
Vesting percentage (as a percent) 25.00%