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STOCKHOLDERS' EQUITY - PRICING MODEL ASSUMPTIONS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Compensation cost related to unvested stock awards not yet recognized      
Compensation cost not yet recognized, net of estimated forfeitures (in dollars) $ 17,791,000    
Period for recognition of compensation cost on weighted average basis 26 months    
Stock Options      
Assumptions used to estimate fair value of awards      
Dividend yield (as a percent) 0.00% 0.00% 0.00%
Expected volatility range, minimum (as a percent) 77.20% 77.50% 78.10%
Expected volatility range, maximum (as a percent) 81.70% 78.30% 79.30%
Risk-free interest rate range, minimum (as a percent) 1.69% 0.51% 0.31%
Risk-free interest rate range, maximum (as a percent) 4.57% 1.30% 1.62%
Expected term range 5 years 6 months 5 years 6 months 5 years 3 months
Additional disclosures      
Weighted average estimated fair value of employee stock options granted (in dollars per share) $ 0.92 $ 1.17 $ 0.88
Employee Stock Purchase Plan      
Assumptions used to estimate fair value of awards      
Dividend yield (as a percent) 0.00% 0.00% 0.00%
Expected volatility range, minimum (as a percent) 61.40% 50.70% 47.80%
Expected volatility range, maximum (as a percent) 86.50% 70.70% 81.80%
Risk-free interest rate range, minimum (as a percent) 0.40% 0.09% 0.16%
Risk-free interest rate range, maximum (as a percent) 2.79% 0.16% 1.57%
Additional disclosures      
Weighted average estimated fair value of other than employee stock options granted (in dollars per share) $ 0.48 $ 0.56 $ 0.62
Employee Stock Purchase Plan | Minimum      
Assumptions used to estimate fair value of awards      
Expected term range 6 months 6 months 6 months
Employee Stock Purchase Plan | Maximum      
Assumptions used to estimate fair value of awards      
Expected term range 12 months 12 months 12 months