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SHARE-BASED COMPENSATION - Share Option Activities (Details) - USD ($)
 12 Months Ended
Jan. 16, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Options          
Outstanding at the beginning   4,809,078 3,294,467 866,028  
Granted (in shares)   2,640,598 1,894,119 6,313,373  
Exercised (in shares)   (197,975) (233,958) (3,694,934)  
Forfeited (in shares)   (964,789) (145,550) (190,000)  
Outstanding at the end   6,286,912 4,809,078 3,294,467 866,028
Vested and expected to vest at the end   6,286,912      
Exercisable at the end   2,070,533 1,486,318    
Weighted Average Exercise Price          
Outstanding at the beginning (in dollars per share)   $ 5.91 $ 1.75 $ 0.65  
Granted (in dollars per share) $ 13.85 3.28 12.31 2.00  
Exercised (in dollars per share)   2.08 0.99 1.93  
Forfeited (in dollars per share)   6.75 3.02 1.70  
Outstanding at the end (in dollars per share)   4.80 5.91 1.75 $ 0.65
Vested and expected to vest at the end (in dollars per share)   4.80      
Exercisable at the end (in dollars per share)   6.35 5.87    
Weighted Average Grant Date Fair Value          
Outstanding at the beginning (in dollars per share)   7.38 6.65 3.67  
Granted (in dollars per share) $ 7.85 2.13 8.39 7.01  
Exercised (in dollars per share)   6.95 5.13 6.55  
Forfeited (in dollars per share)   7.57 7.71 6.91  
Outstanding at the end (in dollars per share)   5.16 7.38 $ 6.65 $ 3.67
Vested and expected to vest at the end (in dollars per share)   5.16      
Exercisable at the end (in dollars per share)   $ 6.87 $ 7.05    
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value          
Outstanding (in years)   8 years 5 months 8 days 8 years 8 months 4 days 8 years 9 months 10 days 7 years 3 months 7 days
Vested and expected to vest at the end (in years)   8 years 5 months 8 days      
Exercisable at the end (in years)   7 years 7 months 13 days 8 years 2 months 12 days    
Outstanding at the beginning (in dollars)   $ 2,619,574 $ 33,410,968 $ 6,328,171  
Outstanding at the end (in dollars)   94,990 2,619,574 $ 33,410,968 $ 6,328,171
Vested and expected to vest at the end (in dollars)   94,990      
Exercisable at the end (in dollars)   $ 55,880 $ 874,180