Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock option activity (Details)

v3.21.2
Stock-Based Compensation - Stock option activity (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Number of Options    
Outstanding beginning balance | shares 14,713  
Options granted | shares 1,707  
Options exercised | shares (1,710)  
Options forfeited | shares (271)  
Outstanding Ending balance | shares 14,439 14,713
Options expected to vest | shares 4,136  
Options exercisable | shares 6,404  
Weighted Average Exercise Price    
Outstanding beginning balance (in dollars per share) | $ / shares $ 4.47  
Options granted (in dollars per share) | $ / shares 30.95  
Options exercised (in dollars per share) | $ / shares 3.28  
Options forfeited (in dollars per share) | $ / shares 7.15  
Outstanding ending balance (in dollars per share) | $ / shares 7.70 $ 4.47
Options expected to vest (in dollars per share) | $ / shares 16.20  
Options exercisable (in dollars per share) | $ / shares $ 3.68  
Additional disclosures    
Weighted Average Remaining Contractual Life (Years) 7 years 4 months 28 days 7 years 9 months 14 days
Options expected to vest (in years) 8 years 10 months 24 days  
Options exercisable (Years) 6 years 8 months 12 days  
Aggregate Intrinsic Value, outstanding (Beginning balance) | $ $ 181,914  
Aggregate Intrinsic Value, outstanding (ending balance) | $ 383,974 $ 181,914
Aggregate Intrinsic Value, expected to vest | $ 75,637  
Aggregate Intrinsic Value, exercisable | $ $ 195,205