Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Options and RSUs (Details)

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STOCK-BASED COMPENSATION - Options and RSUs (Details)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2022
USD ($)
$ / shares
shares
Employee stock options and Restricted Stock Units  
Additional disclosures  
Total unrecognized compensation costs | $ $ 19.4
Weighted-average recognition period of unrecognized compensation cost 3 years 14 days
Employee stock options  
Number of Shares  
Granted (in shares) 4,470,747
Exercised (in shares) 420,521
Outstanding, end of period (in shares) 32,639,145
Employee stock options | Vesting upon achievement of corporate performance-based milestones  
Number of Shares  
Outstanding, end of period (in shares) 2,410,000
Additional disclosures  
Total unrecognized compensation costs | $ $ 4.7
Restricted stock units  
Number of Shares  
Granted (in shares) 1,012,612
Vested (in shares) 22,500
Outstanding, end of period (in shares) 1,206,182
Weighted-Average Grant Date Fair Value  
Granted (in dollars per share) | $ / shares $ 2.42
Additional disclosures  
Vesting period 4 years