XML 27 R24.htm IDEA: XBRL DOCUMENT v3.19.3
Note 4 - Stock Options and Warrants - Warrant Activity (Details) - $ / shares
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Warrants, number of shares (in shares)  
Warrants, exercise price (in dollars per share)  
Issued, number of shares (in shares) 71,795 0
Issued, exercise price (in dollars per share) $ 1.95  
Warrants, number of shares (in shares) 71,795  
Warrants, exercise price (in dollars per share) $ 1.95