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Net Loss Per Share - Schedule of Dilutive Shares Excluded from Calculation of Diluted Net Loss Per Share (Details) - shares
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive shares 13,930,583 12,821,991
Restricted Stock subject to future vesting    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive shares 1,335,370 100,881
Options to Purchase Common Stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive shares 12,524,807 12,634,433
Shares Committed Under 2019 ESPP    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive shares 70,406 86,677