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Net Loss Per Share Attributable to Common Stockholders - Schedule of Anti-Dilutive Shares Excluded from Computation Of Net Income Per Share (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities (in shares) 4,285 1,013 2,992 1,201
Convertible preferred stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities (in shares) 2,866 0 1,595 0
Restricted stock units        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities (in shares) 1,134 599 1,055 748
Common stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities (in shares) 278 414 330 453
Employee stock purchase plan        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities (in shares) 7 0 12 0