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Note 7 - Collaborative Agreements (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 39 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Research and Development Expense $ 120,180 $ 290,577 $ 258,992 $ 227,812  
In Process Research and Development [Member]          
Research and Development Expense     $ 20,233.34 $ 3,000  
University of Toronto [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures         25,000
University of Toronto [Member] | Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period         10 years
University of Toronto [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 1   $ 1   $ 1
Professor [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares         275,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures         483,299
Professor [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 1   $ 1   $ 1
Professor [Member] | Maximum [Member] | Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period         13 years
Professor [Member] | Minimum [Member] | Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period         10 years