Quarterly report pursuant to Section 13 or 15(d)

Share-based compensation - Summary of stock option activity under the Plans (Details)

v3.21.1
Share-based compensation - Summary of stock option activity under the Plans (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Options Outstanding    
Beginning balance | shares 47,332  
Granted | shares 13,638  
Ending balance | shares 60,970 47,332
Options exercisable | shares 37,130  
Weighted Average Exercise Price    
Beginning balance | $ / shares $ 8.03  
Granted | $ / shares 44.00  
Ending balance | $ / shares 16.07 $ 8.03
Options exercisable | $ / shares $ 4.71  
Weighted Average Remaining Contractual Term in Years    
Weighted average remaining contractual term 8 years 10 months 24 days 8 years 9 months 18 days
Granted 10 years  
Options exercisable 8 years 2 months 12 days  
Aggregate intrinsic value    
Beginning balance | $ $ 1,325,903  
Ending balance | $ 1,353,829 $ 1,325,903
Options exercisable | $ $ 1,185,190