Quarterly report pursuant to Section 13 or 15(d)

4. Stock Incentive Plan (Details 1)

v3.21.1
4. Stock Incentive Plan (Details 1) - shares
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of shares outstanding 1,448,796 1,258,577 1,087,463
Number of shares fully vested and exercisable 1,039,071    
Option 1      
Exercise price $0.001-$5.00    
Number of shares outstanding 557,420    
Weighted average remaining contractual life 5 years 5 months 19 days    
Number of shares fully vested and exercisable 555,670    
Weighted average remaining contractual life 5 years 5 months 16 days    
Option 2      
Exercise price $5.01-$10.00    
Number of shares outstanding 732,519    
Weighted average remaining contractual life 7 years 11 months 23 days    
Number of shares fully vested and exercisable 400,390    
Weighted average remaining contractual life 7 years 3 months 11 days    
Option 3      
Exercise price $10.01-$15.00    
Number of shares outstanding 146,732    
Weighted average remaining contractual life 8 years 10 months 2 days    
Number of shares fully vested and exercisable 74,428    
Weighted average remaining contractual life 8 years 10 months 2 days    
Option 4      
Exercise price $15.01-$20.00    
Number of shares outstanding 12,125    
Weighted average remaining contractual life 8 years 1 month 2 days    
Number of shares fully vested and exercisable 8,583    
Weighted average remaining contractual life 7 years 9 months 22 days