Quarterly report pursuant to Section 13 or 15(d)

STOCK BASED COMPENSATION - Restricted Stock Units (Details)

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STOCK BASED COMPENSATION - Restricted Stock Units (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award    
Weighted-average period 4 months 24 days  
Weighted Average Grant Date Fair Value    
Stock-based compensation expense $ 7,838 $ 9,313
Restricted Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award    
Vesting period 4 years  
Cliff vesting period 1 year  
Unrecognized compensation costs, non-vested RSUs $ 41,200  
Weighted-average period 2 years 3 months 18 days  
Shares Subject to Vesting    
Balance at beginning of period, unvested shares (in shares) 23,055  
Granted (in shares) 9,008  
Vested (in shares) (4,964)  
Cancelled/Forfeited (in shares) (1,522)  
Balance at end of period, unvested shares (in shares) 25,577  
Weighted Average Grant Date Fair Value    
Balance at beginning of Period, unvested shares (in dollars per share) $ 2.84  
Granted (in dollars per share) 0.76  
Vested (in dollars per share) 1.76  
Cancelled/Forfeited (in dollars per share) 3.51  
Balance at end of Period, unvested shares (in dollars per share) $ 2.28  
Stock-based compensation expense $ 7,500 $ 8,700