Quarterly report pursuant to Section 13 or 15(d)

Share-based compensation - Narrative (Details)

v3.21.2
Share-based compensation - Narrative (Details) - Plan
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted | shares   299,984
Exercise price | $ / shares   $ 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
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 | $ / shares   $ 6.50
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 | $ / shares   $ 7.51
Vesting over one year    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage   8.33%
Vesting after one year    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage   33.333%
Vesting in 24 monthly installments thereafter    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage   66.667%
Stock options    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Abstract]    
Share-based compensation expense $ 34,244 $ 59,069
Unrecognized compensation expense $ 1,091,215 $ 1,091,215