Quarterly report pursuant to Section 13 or 15(d)

Share-based compensation - Equity Incentive Plan (Details)

v3.23.3
Share-based compensation - Equity Incentive Plan (Details) - Plan - $ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Number of Shares      
Outstanding at the beginning of the period 1,631,897    
Granted 31,500 262,500  
Forfeited (12,250)    
Outstanding at the end of the period 1,651,147   1,631,897
Exercisable at June 30, 2023 812,511    
Weighted Average Exercise Price      
Outstanding the beginning of the period $ 4.85    
Granted 1.85 $ 4.23  
Forfeited 6.75    
Outstanding at the end of the period 4.78   $ 4.85
Exercisable at June 30, 2023 $ 8.48    
Weighted Average Remaining Contractual Term (years)      
Weighted average remaining contractual term (years) 8 years 3 months 29 days   9 years 14 days
Exercisable at June 30, 2023 7 years 6 months 14 days