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Share-Based Compensation - Weighted-average Assumptions (Details) - Options to purchase common stock - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected stock price volatility 61.30% 65.50% 62.20% 66.40%
Risk free interest rate 3.00% 0.70% 1.60% 0.50%
Expected life of options (years) 5 years 3 months 18 days 5 years 4 months 24 days 5 years 3 months 18 days 5 years 4 months 24 days
Expected annual dividend per share (in dollars per share) $ 0 $ 0 $ 0 $ 0