Annual report pursuant to Section 13 and 15(d)

Net Loss Per Share - Antidilutive Securities (Details)

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Net Loss Per Share - Antidilutive Securities (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total anti-dilutive shares (in shares) 10,811 49,930 37,567
Redeemable convertible preferred stock      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total anti-dilutive shares (in shares) 0 40,843 31,145
Stock options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total anti-dilutive shares (in shares) 10,601 6,289 5,514
Restricted stock units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total anti-dilutive shares (in shares) 155 351 351
Convertible preferred stock warrants and option      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total anti-dilutive shares (in shares) 0 2,347 412
Other awards including contingently issuable shares      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total anti-dilutive shares (in shares) 55 100 145