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Stock Options (Details) - Employee Stock Option [Member] - USD ($)
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Number of options    
Outstanding 2,004,318 620,900
Granted 634,756 1,334,851
Forfeited (64,330) (21,600)
Exercise (3,333)  
Expired (25,000)
Outstanding 2,571,411 1,909.151
Vested and exercisable 1,623,746 742,434
Weighted average exercise price    
Outstanding $ 1.72 $ 3.75
Granted 2.58 0.85
Forfeited 0.92 1.35
Exercise 0.79
Expired   6.2
Outstanding 1.95 1.72
Vested and exercisable $ 1.97 $ 2.76
Weighted average contractual term (years)    
Outstanding 7 years 11 months 8 days 9 years 1 month 13 days
Vested and exercisable 8 years 2 months 23 days 8 years 4 months 2 days
Aggregate intrinsic value    
Outstanding $ 2,542,361
Forfeited 18,520 855
Exercise 3,166  
Outstanding 1,165,626 379,582
Vested and exercisable and expected to vest thereafter $ 971,228 $ 108,686