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Share-based Compensation - Activity (Details)
3 Months Ended
Mar. 31, 2022
shares
Stock Options  
Outstanding — beginning balance 8,085,793
Granted 1,302,500
Exercised (130,790)
Canceled (583,612)
Outstanding — ending balance 8,673,891
Exercisable — ending balance 4,931,898
RSUs  
Restricted Stock Units  
Non-vested — beginning balance 1,247,723
Granted 2,139,100
Vested (1,892,613)
Forfeited (50,700)
Non-vested — ending balance 1,443,510