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STOCK-BASED COMPENSATION - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Jan. 01, 2024
Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options outstanding (in shares) 10,374,371     7,523,947
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average grant date fair value of options granted (in dollars per share) $ 2.93 $ 4.53    
Expected dividend yield 0.00% 0.00%    
Option, cost not yet recognized, amount $ 15.1      
Weighted average period of recognition (in years) 2 years 6 months      
Stock Options | Granted after December 31, 2017        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 48 months      
Cliff period (in years) 1 year      
Contractual term (in years) 10 years      
Stock Options | Granted prior to December 31, 2017        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Contractual term (in years) 10 years      
Stock Options | Minimum | Granted after December 31, 2017        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 12 months      
Stock Options | Minimum | Granted prior to December 31, 2017        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 months      
Stock Options | Maximum | Granted after December 31, 2017        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 48 months      
Stock Options | Maximum | Granted prior to December 31, 2017        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 24 months      
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Weighted average period of recognition (in years) 2 years 1 month 6 days      
Non option, cost not yet recognized, amount $ 4.6      
RSUs | Share-Based Payment Arrangement, Tranche One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 33.33%      
RSUs | Share-Based Payment Arrangement, Tranche Two        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 33.33%      
RSUs | Share-Based Payment Arrangement, Tranche Three        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 33.33%      
Employee Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding stock maximum 1.00%      
Common stock, capital shares reserved for future issuance (in shares)     579,105  
Number of shares authorized (in shares) 1,769,088      
Shares of common stock outstanding maximum (in shares) 800,000      
Shares issued in period (in shares) 0      
2021 Equity Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum threshold common stock issuable on exercise of incentive stock options (in shares) 12,000,000      
Common stock, capital shares reserved for future issuance (in shares)     2,895,523  
2021 Equity Incentive Plan | Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding stock maximum 5.00%      
Number of shares authorized (in shares) 14,668,721      
Shares available for future grant (in shares) 2,535,928      
2013 Equity Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options outstanding (in shares) 3,227,248