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Note 8 - Collaborative Agreements (Details Textual) - USD ($)
12 Months Ended 133 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
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] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price 1   $ 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     129,000
Professor [Member] | Minimum [Member] | Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years
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] | 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
Professor [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures     483,299
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares 62,500   62,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares 1,707,744   1,707,744
Research and Development Expense, Sponsored Research $ 170,575 $ 67,270