Quarterly report pursuant to Section 13 or 15(d)

Share-based compensation - Narrative (Details)

v3.21.2
Share-based compensation - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Abstract]          
Share-based compensation expense   $ 2,000,000   $ 2,000,000  
Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted     299,984   229,984
Exercise price     $ 6.85   $ 6.85
Vesting period     10 years    
Aggregate grant date fair value     $ 1,150,284    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]          
Expected dividends     $ 0    
Plan | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]          
Discount rates     0.505%    
Expected life     5 years 3 months 7 days    
Expected volatility     89.04%    
Fair market value     $ 6.50    
Plan | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]          
Discount rates     1.075%    
Expected life     6 years    
Expected volatility     90.16%    
Fair market value     $ 7.51    
Plan | Vesting over one year          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     8.33%    
Plan | Vesting after one year          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     33.333%    
Plan | Vesting in 24 monthly installments thereafter          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     66.667%    
Plan | Stock options          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Abstract]          
Share-based compensation expense $ 131,906   $ 190,975    
Unrecognized compensation expense $ 959,309   $ 959,309