Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stockholders' Equity - Summary of Stock Option Activity (Details)

v3.19.2
Note 4 - Stockholders' Equity - Summary of Stock Option Activity (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Options Outstanding (in shares) 81,633    
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 215.60    
Weighted- average remaining contractual life (Year) 6 years 182 days   5 years 36 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 46,379 0  
Options Granted, Weighted Average Exercise Price (in dollars per share) $ 8.53    
Options Exercised (in shares)    
Options Exercised, Weighted Average Exercise Price (in dollars per share)    
Options Forfeited/Expired (in shares) (2,531)    
Options Forfeited/Expired, Weighted Average Exercise Price (in dollars per share) $ 323.42    
Options Outstanding (in shares) 125,481   81,633
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 136.85   $ 215.60
Aggregate intrinsic value    
Options Exercisable (in shares) 98,621    
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 171.27    
Options Exercisable, Weighted Average Remaining Contractual Life (Year) 5 years 255 days    
Options Exercisable, Aggregate Intrinsic Value