Annual report pursuant to Section 13 and 15(d)

Net Loss Per Share - Anti-dilutive Outstanding Shares of Common Stock Equivalents Excluded from Computation of Diluted Net Loss per Share (Details)

v3.20.4
Net Loss Per Share - Anti-dilutive Outstanding Shares of Common Stock Equivalents Excluded from Computation of Diluted Net Loss per Share (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Anti-dilutive securities excluded from computation of diluted net loss per share 4,497,981 3,137,093 2,270,723
Options to Purchase Common Stock      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Anti-dilutive securities excluded from computation of diluted net loss per share 4,489,122 3,107,066 2,181,466
Common stock subject to future vesting [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Anti-dilutive securities excluded from computation of diluted net loss per share 8,859 30,027 89,257