Annual report pursuant to Section 13 and 15(d)

Share-based compensation - Options granted and outstanding (Details)

v3.21.1
Share-based compensation - Options granted and outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Options    
Options outstanding (in shares) 7,791,833  
Granted (in shares) 1,050,000  
Forfeited/Expired (in shares) (1,026,391)  
Options outstanding (in shares) 7,815,442 7,791,833
Options exercisable (in shares) 5,684,467  
Weighted average exercise price    
Options outstanding (in dollars per share) $ 1.85  
Granted (in dollars per share) 0.86  
Forfeited/Expired (in dollars per share) (1.62)  
Options outstanding (in dollars per share) 0.80 $ 1.85
Options exercisable, weighted average exercise price (in dollars per share) $ 0.83  
Weighted Average Remaining Contractual Life    
Options outstanding, weighted average remaining contractual term 8 years 7 months 6 days 9 years 6 months
Options exercisable, weighted average remaining contractual term 8 years 3 months 18 days  
Aggregate Intrinsic Value    
Options outstanding, aggregate intrinsic value $ 4,246 $ 0
Options exercisable, aggregate intrinsic value $ 3,094