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Stock-Based Compensation - Summary of Stock Option Activity (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Number of shares, Outstanding at beginning of period 7,179,482  
Number of shares, Granted 1,646,416  
Number of shares, Exercised (93,032)  
Number of shares, Forfeited (191,849)  
Number of shares, Outstanding at end of period 8,541,017 7,179,482
Number of shares, Exercisable at March 31, 2022 2,285,520  
Weighted average exercise price per share, Outstanding at beginning of period $ 15.36  
Weighted average exercise price per share, Granted 10.60  
Weighted average exercise price per share, Exercised 1.64  
Weighted average exercise price per share, Forfeited 17.86  
Weighted average exercise price per share, Outstanding at end of period 14.54 $ 15.36
Weighted average exercise price per share, Exercisable at March 31, 2022 $ 8.08  
Weighted average remaining contractual term (years), Outstanding 8 years 8 months 12 days 8 years 7 months 28 days
Weighted average remaining contractual term (years), Exercisable 7 years 10 months 6 days