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Note 8 - Collaborative Agreements (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 133 Months Ended 139 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Jun. 30, 2016
University of Toronto [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price         $ 1  
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]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures         25,000  
Professor [Member] | Maximum [Member] | Employee Stock Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period           13 years
Professor [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 1   $ 1     $ 1
Professor [Member] | Minimum [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           275,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares 125,000   125,000     125,000
In Process Research and Development [Member]            
Research and Development Expense $ 3,000 $ 7,056        
Research and Development Expense $ 374,206 $ 39,975 $ 422,721 $ 61,424