Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.1
Stock Based Compensation - Stock Options With Service-based Vesting Conditions (Details) - Service Based Options
 3 Months Ended 12 Months Ended
Mar. 31, 2022
$ / shares
shares
Dec. 31, 2021
$ / shares
shares
Number of shares    
Balance, beginning of period (in shares) | shares 12,650,978  
Granted (in shares) | shares 4,898,451  
Forfeited (in shares) | shares (1,445,139)  
Expired (in shares) | shares (16,250)  
Balance, ending of period (in shares) | shares 16,088,040 12,650,978
Exercisable (in shares) | shares 8,333,750  
Weighted average exercise price per share    
Balance, beginning of period (in dollars per share) $ 3.69  
Granted (in dollars per share) 0.79  
Forfeited (in dollars per share) 2.68  
Expired (in dollars per share) 2.40  
Balance, ending of period (in dollars per share) 2.90 $ 3.69
Exercisable (in dollars per share) 3.86  
Weighted average grant date fair value per share    
Balance, beginning of period (in dollars per share) 2.29  
Granted (in dollars per share) 0.57  
Forfeited (in dollars per share) 1.83  
Expired (in dollars per share) 1.63  
Balance, ending of period (in dollars per share) 1.80 $ 2.29
Exercisable (in dollars per share) $ 2.32  
Weighted average remaining contractual term (in years)    
Weighted average remaining contractual term 7 years 8 years 1 month 6 days
Exercisable 4 years 9 months 18 days