Quarterly report pursuant to Section 13 or 15(d)

Stock Award Plans and Stock-Based Compensation - Additional Information (Details)

v3.22.1
Stock Award Plans and Stock-Based Compensation - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price limit (percent) 100.00%  
Exercise price limit for individuals owning over ten percent (percent) 110.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years  
Aggregate number of shares available for future grant under stock option plan 11,321,164  
2011 Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option grants during period (in shares) 70  
2018 Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
2018 Plan aggregate number of options authorized (in shares) 43,000,000  
Stock option grants during period (in shares) 31,678,907  
Non Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non plan stock options granted (in shares) 1  
Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options granted under the option plans vest over periods 4 years  
Option life under the plan 10 years  
Share-based payment charges $ 0.9 $ 0.5