Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stockholders' Deficit - Warrants (Details)

v3.19.2
Note 6 - Stockholders' Deficit - Warrants (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Warrant outstanding, shares (in shares) 776,350  
Warrant outstanding, weighted average exercise price (in dollars per share) $ 1.75  
Warrant outstanding, weighted average remaining contractual term (Year) 4 years 222 days 4 years 292 days
Warrant granted, shares (in shares) 924,581  
Warrant granted, weighted average exercise price (in dollars per share) $ 9.73  
Warrant exercised, shares (in shares) (205,715)  
Warrant exercised, weighted average exercise price (in dollars per share) $ 3  
Warrant exercised, aggregate intrinsic value $ 2,407,008  
Warrant forfeited (cashless exercise), shares (in shares) (114,383)  
Warrant forfeited (cashless exercise), weighted average exercise price (in dollars per share) $ 5.15  
Warrant outstanding, shares (in shares) 1,380,833 776,350
Warrant outstanding, weighted average exercise price (in dollars per share) $ 6.63 $ 1.75
Warrant outstanding, aggregate intrinsic value $ 11,148,662  
Warrant exercisable, shares (in shares) 1,380,833  
Warrant exercisable, weighted average exercise price (in dollars per share) $ 5.90  
Warrant exercisable, weighted average remaining contractual term (Year) 4 years 222 days  
Warrant exercisable, aggregate intrinsic value $ 12,148,662