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Note 16 - Significant Alliances and Related Parties (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 30, 2020
Research and Development Expense, Total $ 3,434,977 $ 4,383,325   $ 6,274,936 $ 4,509,890    
Due to Related Parties, Current, Total 200,000     200,000   $ 0 $ 0
RPCI [Member]              
Research and Development Expense, Total 0 0   0 1,197    
The Cleveland Clinic [Member]              
Research and Development Expense, Total       0 0    
BBL [Member]              
Research and Development Expense, Total 0 0   0 0    
Sublease and Other Income, Related Parties 0 0   0 0    
Accounts Receivable, Related Parties, Gross 0 6,285   0 6,285    
Accounts Receivable, Related Parties 0 0   0 0    
Incuron [Member]              
Sublease and Other Income, Related Parties 0 0   0 0    
Accounts Receivable, Related Parties, Gross 0 130,000   0 130,000    
Accounts Receivable, Related Parties 0 130,000   0 130,000    
Revenue from Related Parties 0 0   0 49,357    
GPI [Member]              
Related Party Transaction, Expenses from Transactions with Related Party 13,440 $ 13,440   $ 40,320 $ 40,320    
Noreen Griffin [Member]              
Investor Ownership Percentage of Company     1.20% 1.00%      
Advance from Noreen Griffin [Member]              
Due to Related Parties, Current, Total $ 200,000     $ 200,000