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SHARE-BASED PAYMENT - Changes in outstanding share options (Details)
 6 Months Ended
Jun. 30, 2023
Options
$ / shares
Jun. 30, 2022
Options
$ / shares
Number of options    
Options at beginning of year | Options 5,286,884 3,854,651
Granted | Options 264,291 1,317,338
Exercised | Options (23,126) (113,178)
Forfeited | Options (79,476) (204,579)
Options outstanding at end of year | Options 5,448,573 4,854,232
Options exercisable at end of year | Options 3,112,899 2,366,149
Weighted average exercise price    
Options at beginning of year | $ / shares $ 3.21 $ 1.61
Granted | $ / shares 4.25 4.17
Exercised | $ / shares 0.81 0.98
Forfeited | $ / shares 2.64 1.78
Options outstanding at end of year | $ / shares 3.27 2.31
Options exercisable at end of year | $ / shares $ 1.97 $ 1.14