Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Stockholders' Equity - Summary of Stock Option Activity (Details)

v3.7.0.1
Note 5 - Stockholders' Equity - Summary of Stock Option Activity (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Options Outstanding (in shares) 1,691,987  
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 22.60  
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 22.14 $ 22.60
Weighted-average remaining contractual life (Year) 4 years 255 days 5 years 36 days
Options Granted (in shares) 33,408  
Options Granted, Weighted Average Exercise Price (in dollars per share) $ 4.96  
Options Exercised (in shares)  
Options Exercised, Weighted Average Exercise Price (in dollars per share)  
Forfeited (in shares) (15,386)  
Forfeited, Weighted Average Exercise Price (in dollars per share) $ 36.40  
Options Outstanding (in shares) 1,710,009 1,691,987
Aggregate intrinsic value $ 287,704  
Options Exercisable (in shares) 1,438,619  
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 24.68  
Options Exercisable, Weighted Average Remaining Contractual Life (Year) 4 years  
Options Exercisable, Aggregate Intrinsic Value $ 31,115