Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation - Stock Options With Service-based Vesting Conditions (Details)

v3.22.0.1
Stock Based Compensation - Stock Options With Service-based Vesting Conditions (Details) - Service Based Options - $ / shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Number of shares    
Balance, beginning of period (in shares) 8,830,674  
Granted (in shares) 5,336,173  
Exercised (in shares) (580,617)  
Forfeited (in shares) (567,758)  
Expired (in shares) (367,494)  
Balance, end of period (in shares) 12,650,978 8,830,674
Exercisable (in shares) 5,106,090  
Weighted average exercise price per share    
Balance, beginning of period (in dollars per share) $ 3.95  
Granted (in dollars per share) 3.18  
Exercised (in dollars per share) 2.70  
Forfeited (in dollars per share) 3.41  
Expired (in dollars per share) 4.47  
Balance, end of period (in dollars per share) 3.69 $ 3.95
Exercisable (in dollars per share) 4.11  
Weighted average grant date fair value per share    
Balance, beginning of period (in dollars per share) 2.36  
Granted (in dollars per share) 2.13  
Exercised (in dollars per share) 1.74  
Forfeited (in dollars per share) 2.54  
Expired (in dollars per share) 3.74  
Balance, end of period (in dollars per share) 2.29 $ 2.36
Exercisable (in dollars per share) $ 2.37  
Weighted average remaining contractual term (in years)    
Weighted average remaining contractual term 8 years 1 month 6 days 7 years 8 months 12 days
Exercisable 7 years