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STOCK-BASED COMPENSATION - Summary of Restricted Stock Units Activity (Details) - Restricted stock units
9 Months Ended
Sep. 30, 2022
$ / shares
shares
Number of Shares  
Unvested, balance at beginning of period (in shares) | shares 3,925,097
Granted (in shares) | shares 2,440,603
Vested (in shares) | shares (1,008,620)
Forfeited (in shares) | shares (252,733)
Unvested, balance at end of period (in shares) | shares 5,104,347
Weighted-Average Grant Date Fair Value  
Unvested, balance at beginning of period (in dollars per share) | $ / shares $ 5.60
Granted (in dollars per share) | $ / shares 11.76
Vested (in dollars per share) | $ / shares 6.22
Forfeited (in dollars per share) | $ / shares 12.07
Unvested, balance at end of period (in dollars per share) | $ / shares $ 8.11