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Note 12 - Related Party Transactions (Details Textual) - Emory [Member] - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Ongoing Patent Cost Reimbursements [Member]      
Related Party Transaction, Expenses from Transactions with Related Party $ 113,914 $ 179,958 $ 98,042
Research Agreements [Member]      
Related Party Transaction, Expenses from Transactions with Related Party $ 0 $ 0 $ 252,478