Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION - Summary of the Share Options Activities (Details)

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SHARE-BASED COMPENSATION - Summary of the Share Options Activities (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Number of shares      
Outstanding at the beginning of the period (in shares) 1,376,742 810,832 827,198
Granted (in shares) 587,697 797,700 181,750
Exercised (in shares) (113,328) (53,538) (62,416)
Forfeited (in shares) (162,518) (178,252) (135,700)
Outstanding at the end of the period (in shares) 1,688,593 1,376,742 810,832
Vested and expected to vest at the end of the period (in shares) 1,688,593    
Exercisable at the end of the period (in shares) 1,025,496    
Outstanding at the beginning of the period (in dollars per share) $ 1.03 $ 1.02 $ 1.01
Granted (in dollars per share) 1.07 0.99 0.57
Exercised (in dollars per share) 0.58 0.58 0.58
Forfeited (in dollars per share) 0.57 0.97 0.57
Outstanding at the end of the period (in dollars per share) 1.12 $ 1.03 $ 1.02
Vested and expected to vest at the end of the period (in dollars per share) 1.12    
Exercisable at the end of the period (in dollars per share) $ 1.15    
Weighted remaining contractual Years      
Vested and expected to vest at the end of the period 6 years 14 days    
Exercisable at the end of the period 5 years 9 months 25 days    
Aggregate intrinsic value      
Vested and expected to vest at the end of the period (in dollars) $ 3,093    
Exercisable at the end of the period (in dollars) $ 1,747