Annual report pursuant to Section 13 and 15(d)

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

v3.19.1
Note 4 - Stockholders' Equity - Summary of Stock Option Activity (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Options Outstanding (in shares) 1,894,077  
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 19.76  
Weighted- average remaining contractual life (Year) 5 years 36 days 4 years 255 days
Aggregate intrinsic value $ 108,000
Options Granted (in shares) 488,640  
Options Granted, Weighted Average Exercise Price (in dollars per share) $ 1.13  
Options Exercised (in shares)  
Options Forfeited/Expired (in shares) (750,055)  
Options Forfeited/Expired, Weighted Average Exercise Price (in dollars per share) $ 27.19  
Options Outstanding (in shares) 1,632,662 1,894,077
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 10.78 $ 19.76
Options Exercisable (in shares) 1,166,127  
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 14.59  
Options Exercisable, Weighted Average Remaining Contractual Life (Year) 4 years 146 days