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Net Loss per Share - Summary of Antidilutive Securities Excluded From Computation Diluted Weighted Average Shares Outstanding (Details) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share amount (in shares) 16,435,812 11,825,816
Options to Purchase Common Stock    
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share amount (in shares) 1,763,007 2,568,776
Unvested Restricted Stock Units    
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share amount (in shares) 3,953,263 3,715,342
Employee Stock Purchase Plan    
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share amount (in shares) 7,889 11,522
Convertible Debt Securities    
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share amount (in shares) 10,711,653 5,530,176