XML 84 R56.htm IDEA: XBRL DOCUMENT v3.22.4
Share-based compensation - Option Activity and Restricted Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Number of shares    
Options, Beginning balance 2,005,756  
Options, Granted 563,900  
Options, Forfeited (24,990)  
Options, Expired (6,791)  
Options, Exercised (18,470)  
Options, Ending balance 2,519,405 2,005,756
Options, Exercisable 1,239,114  
Weighted Average Exercise price    
Beginning price $ 11.26  
Granted 3.63  
Forfeited 11.97  
Expired 17.54  
Exercised 1.76  
Ending price 9.60 $ 11.26
Exercisable $ 8.86  
Additional information    
Weighted Average Remaining Contractual Term 7 years 10 months 24 days 8 years 6 months
Weighted Average Remaining Contractual Term, Granted 9 years 2 months 8 days  
Weighted Average Remaining Contractual Term, Exercised 6 years 7 months 13 days  
Weighted Average Remaining Contractual Term, Exercisable 7 years 3 months 18 days  
Weighted average grant date fair value $ 2.65 $ 16.49
Intrinsic value, exercised $ 0.2  
Intrinsic value, exercisable 0.8  
Intrinsic value, outstanding $ 0.9