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SHARE-BASED COMPENSATION - Options to Employees (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2010
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
SHARE-BASED COMPENSATION        
Maximum aggregate number of shares to be issued 2,330,000      
Annual percentage increase in authorized shares on the first day of each of 2007, 2008 and 2009 prior to the year of amendment for awards other than incentive option shares 1.00%      
Annual percentage increase in authorized shares on the first day of each calendar year from the year of amendment for awards other than incentive option shares 2.50%      
Number of shares to be granted after expiration   0    
Expiry term of share options   10 years    
Compensation cost   $ 0 $ 0 $ 0
Options | Employees        
SHARE-BASED COMPENSATION        
Option exercised   0 0 0
Options outstanding   26,291    
Weighted average exercise price of options outstanding (in dollars per share)   $ 9.33    
Weighted average remaining contract terms of options outstanding (in years)   4 months 24 days    
Intrinsic value of outstanding options (in dollars)   $ 444