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STOCKHOLDERS' EQUITY (DEFICIT) - Restricted stock awards and restricted stock units (Details)
9 Months Ended
Sep. 30, 2024
$ / shares
shares
Restricted stock awards  
Shares of Restricted Common Stock/ Number of Restricted Common Units  
Beginning balance (in shares) | shares 3,381,008
RSAs exchanged for RSUs (in shares) | shares (2,168,508)
Vested (in shares) | shares (1,062,500)
Ending balance (in shares) | shares 150,000
Weighted Average Grant Date Fair Value Per Share  
Beginning balance (in dollars per share) | $ / shares $ 1.53
RSAs exchanged for RSUs (in dollars per share) | $ / shares 0.94
Vested (in dollars per share) | $ / shares 2.60
Ending balance (in dollars per share) | $ / shares $ 2.25
Unvested restricted stock units  
Shares of Restricted Common Stock/ Number of Restricted Common Units  
Beginning balance (in shares) | shares 2,250,000
RSAs exchanged for RSUs (in shares) | shares 2,168,508
Granted (in shares) | shares 851,230
Vested (in shares) | shares (607,127)
Forfeited (in shares) | shares (1,125,000)
Ending balance (in shares) | shares 3,537,611
Vested RSUs undelivered September 30, 2024 (in shares) | shares 750,000
Weighted Average Grant Date Fair Value Per Share  
Beginning balance (in dollars per share) | $ / shares $ 2.05
RSAs exchanged for RSUs (in dollars per share) | $ / shares 0.94
Granted (in dollars per share) | $ / shares 0.38
Vested (in dollars per share) | $ / shares 0.87
Forfeited (in dollars per share) | $ / shares 2.05
Ending balance (in dollars per share) | $ / shares 1.18
Vested RSUs undelivered September 30, 2024 (in dollars per share) | $ / shares $ 2.05