Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plans and Stock-Based Compensation - Stock Options (Details)

v3.22.1
Equity Incentive Plans and Stock-Based Compensation - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Options        
Outstanding as of beginning of period (in shares) 20,787,000 21,183,000 21,191,000 21,471,000
Granted (in shares) 0 0    
Exercised (in shares) (325,000) (39,000)    
Forfeited or expired (in shares) (79,000) (249,000)    
Outstanding as of end of period (in shares) 20,787,000 21,183,000 21,191,000 21,471,000
Options vested and expected to vest as of end of period (in shares) 20,787,000 21,183,000    
Vested and exercisable as of end of period (in shares) 10,306,000 2,904,000    
Weighted-Average Exercise Price        
Outstanding as of beginning of period (in dollars per share) $ 0.58 $ 0.33 $ 0.33  
Granted (in dollars per share) 0 0    
Exercised (in dollars per share) 0.47 0.98    
Forfeited or expired (in dollars per share) 5.50 0.67    
Outstanding as of end of period (in dollars per share) 0.56 0.33 $ 0.58 $ 0.33
Options vested and expected to vest as of end of period (in dollars per share) 0.56 0.33    
Vested and exercisable as of end of period (in dollars per share) $ 0.62 $ 0.93    
Weighted-Average Remaining Contractual Term in years 8 years 8 years 10 months 24 days 8 years 2 months 12 days 9 years 3 months 18 days
Additional Disclosures        
Aggregate intrinsic value of options outstanding $ 181.7   $ 153.2  
Aggregate intrinsic value of options exercised $ 1.7 $ 0.1    
Weighted-average grant date fair value of options granted (in dollars per share) $ 0 $ 0    
Grant date fair value of options vested $ 0.7 $ 0.1