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Note 4 - Stock Options and Warrants (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   
Number of Shares
   
Exercise Price
 
Warrants as of December 31, 2018
   
-
     
-
 
Issued during 2019
   
71,795
     
$1.95
 
Warrants as of September 30, 2019
   
71,795
     
$1.95