Quarterly report pursuant to Section 13 or 15(d)

Share-based compensation - Unregistered Securities (Details)

v3.21.2
Share-based compensation - Unregistered Securities (Details) - Plan - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted 299,984 229,984
Exercise price $ 6.85 $ 6.85
Remaining contractual term 9 years 4 months 6 days 9 years 11 months 23 days
Intrinsic value of options outstanding $ 0  
Non-qualified stock options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted 292,500  
Term 10 years  
Exercise price $ 10.00  
Vesting percentage 100.00%  
Remaining contractual term 9 years 2 months 19 days  
Unrecognized compensation expense $ 0  
Intrinsic value of options exercisable $ 0