Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stockholders' Deficit - Warrants (Details)

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Note 6 - Stockholders' Deficit - Warrants (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 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 240 days 4 years 292 days
Warrant granted, shares (in shares) 452,081  
Warrant granted, weighted average exercise price (in dollars per share) $ 3.18  
Warrant outstanding, shares (in shares) 1,228,431 776,350
Warrant outstanding, weighted average exercise price (in dollars per share) $ 2.28 $ 1.75
Warrant outstanding, aggregate intrinsic value $ 7,154,193  
Warrant exercisable, shares (in shares) 1,228,431  
Warrant exercisable, weighted average exercise price (in dollars per share) $ 2.28  
Warrant exercisable, weighted average remaining contractual term (Year) 4 years 240 days  
Warrant exercisable, aggregate intrinsic value $ 7,154,193