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FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Short-term investments      
Short-term investments $ 0 $ 13,927  
Recurring      
Short-term investments      
Short-term investments   13,927  
Recurring | Wealth Management Products      
Short-term investments      
Short-term investments   13,927  
Nonrecurring      
Short-term investments      
Impairment losses on its long-lived assets $ 0 0 $ 0
Level 2 | Recurring      
Short-term investments      
Short-term investments   13,927  
Level 2 | Recurring | Wealth Management Products      
Short-term investments      
Short-term investments   $ 13,927