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Note 8 - Collaborative Agreements (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended 133 Months Ended 142 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Jun. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares           1,707,744   1,707,744  
Research and Development Expense $ 114,941 $ 203,814 $ 265,238 $ 537,662   $ 456,274 $ 191,069    
In Process Research and Development [Member]                  
Research and Development Expense $ 3,000 $ 7,056   $ 4,500 $ 10,584        
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] | Maximum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price           $ 1   $ 1  
University of Toronto [Member] | Minimum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price           0.26   $ 0.26  
University of Toronto [Member] | Employee Stock Option [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period               10 years  
Professor [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures               483,299 275,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price           $ 1   $ 1  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares 125,000     125,000   62,500   62,500 125,000
Professor [Member] | Maximum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 1     $ 1   $ 1   $ 1 $ 1
Professor [Member] | Minimum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price           $ 0.26   $ 0.26  
Professor [Member] | Employee Stock Option [Member] | Maximum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period               13 years 13 years
Professor [Member] | Employee Stock Option [Member] | Minimum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period               10 years 10 years