Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Schedule of Weighted-average Assumptions (Details)

v3.21.2
STOCK-BASED COMPENSATION - Schedule of Weighted-average Assumptions (Details) - Options - $ / shares
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term (in years) 5 years 10 months 9 days 5 years 11 months 15 days
Expected volatility 51.24% 59.98%
Risk-free interest rate range, minimum 0.54% 0.24%
Risk-free interest rate range, maximum 0.60% 0.51%
Dividend yield 0.00% 0.00%
Grant-date fair value (USD per share) $ 4.01 $ 1.40