Annual report pursuant to Section 13 and 15(d)

Share-based compensation - Equity Incentive Plan (Details)

v3.22.4
Share-based compensation - Equity Incentive Plan (Details) - Plan - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Number of Shares      
Outstanding at the beginning of the period 749,147 519,163  
Granted 912,500 229,984  
Forfeited (29,750)    
Outstanding at the end of the period 1,631,897 749,147 519,163
Exercisable at December 31, 2022 665,326    
Weighted Average Exercise Price      
Outstanding the beginning of the period $ 9.03 $ 10.00  
Granted 1.42 6.85  
Forfeited 4.97    
Outstanding at the end of the period 4.85 $ 9.03 $ 10.00
Exercisable at December 31, 2022 $ 9.30    
Weighted Average Remaining Contractual Term (years)      
Weighted average remaining contractual term (years) 9 years 14 days 9 years 1 month 2 days 9 years 11 months 23 days
Exercisable at December 31, 2022 8 years 21 days