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Share-Based Compensation - Weighted-average Assumptions (Details) - Options to purchase common stock - $ / shares
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected stock price volatility 62.30% 66.70%
Risk free interest rate 1.50% 0.40%
Expected life of options (years) 5 years 3 months 18 days 5 years 4 months 24 days
Expected annual dividend per share (in dollars per share) $ 0 $ 0