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 ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expenses recognized $ 11,600,000 $ 6,700,000 $ 38,200,000 $ 10,100,000
Weighted-average period     1 year 9 months 18 days  
Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     4 years  
Cliff Vesting Period     1 year  
Number of RSUs accelerated for certain key employees 895,044      
Accelerated RSUs termination, resulting in stock compensation expense $ 7,300,000      
Unrecognized compensation costs, non-vested RSUs $ 80.9   $ 80.9  
Weighted-average period     2 years 9 months 18 days  
Shares Subject to Vesting        
Balance at beginning of period, unvested shares (in shares)     16,395,000  
Granted (in shares)     8,736,000  
Vested (in shares)     (3,248,000)  
Cancelled/Forfeited     (2,851,000)  
Balance at end of period, unvested shares (in shares) 19,032,000   19,032,000  
Weighted Average Grant Date Fair Value        
Balance at beginning of Period, unvested shares (in dollars per share)     $ 7.54  
Granted (in dollars per share)     3.56  
Vested (in dollars per share)     11.05  
Cancelled/Forfeited (in dollars per share)     7.50  
Balance at end of Period, unvested shares (in dollars per share) $ 5.12   $ 5.12