XML 58 R46.htm IDEA: XBRL DOCUMENT v3.22.2
Share-based compensation - Option Activity and Restricted Stock (Details) - The Plans - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options, Beginning balance 2,005,756    
Options, Granted 543,900    
Options, Exercised (17,012)    
Options, Ending balance 2,532,644   2,005,756
Options, Exercisable 980,061    
Options, Vested or expected to vest 2,532,644    
Weighted Average Exercise price      
Beginning price $ 11.26    
Granted 3.64    
Exercised 1.87    
Ending price 9.69   $ 11.26
Exercisable 7.84    
Vested or expected to vest $ 9.69    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]      
Weighted Average Remaining Contractual Term 8 years 4 months 28 days   8 years 6 months
Weighted Average Remaining Contractual Term, Granted 9 years 10 months 24 days    
Weighted Average Remaining Contractual Term, Exercised 7 years 10 months 9 days    
Weighted Average Remaining Contractual Term, Exercisable 7 years 7 months 2 days    
Weighted Average Remaining Contractual Term, Vested or expected to vest 8 years 4 months 28 days    
Weighted average grant date fair value $ 2.65 $ 18.00  
Intrinsic value, exercised $ 0.1    
Intrinsic value, outstanding $ 1.8