Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock Option Plans (Details Textual)

v3.8.0.1
Note 6 - Stock Option Plans (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Allocated Share-based Compensation Expense $ 299,175 $ 81,678 $ 543,290 $ 107,205
Employee Stock Option [Member]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 1,421,364 580,331 $ 1,421,364 $ 580,331
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     2 years 182 days 2 years 178 days
Non-employee Options [Member]        
Allocated Share-based Compensation Expense $ 6,067 $ 2,807 $ 12,324 $ 8,421