Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Note 4 - Stockholders' Equity - Summary of Stock Option Activity (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 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 219 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 Exercised, Weighted Average Exercise Price (in dollars per share)  
Options Forfeited (in shares) (550,215)  
Options Forfeited, Weighted Average Exercise Price (in dollars per share) $ 34.52  
Options Outstanding (in shares) 1,832,502 1,894,077
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 10.37 $ 19.76
Options Exercisable (in shares) 1,300,538  
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 14.08  
Options Exercisable, Weighted Average Remaining Contractual Life (Year) 4 years 328 days  
Options Exercisable, Aggregate Intrinsic Value