XML 52 R38.htm IDEA: XBRL DOCUMENT v3.23.2
Shareholders’ equity - Stock-based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average exercise price (in USD per share) $ 2.75 $ 2.33 $ 2.88 $ 2.78
Restricted stock units granted during period (in shares) 0   1,344,550 0
Grant date fair value (in USD per share) $ 2.90 $ 0 $ 2.90 $ 0
Allocated share-based compensation expense $ 2,964 $ 2,065 $ 5,095 $ 3,800
Research and development        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense 977 696 1,852 1,454
General and administrative        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense $ 1,987 $ 1,369 $ 3,243 $ 2,346
Arbutus Plans        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted during period (in shares) 547,600 362,280 4,298,400 4,734,575