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Note 7 - Commitments and Contingencies (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2018
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2016
Dec. 31, 2009
Oct. 31, 2017
Operating Lease, Rent Expense Per Month         $ 2,050        
Payments to Acquire Intangible Assets         44,473 $ 27,413      
Percentage of Outstanding Shares for Warrant to Purchase Shares of Common Stock                 3.00%
National Institute of Health [Member]                  
Royalty on Sales, Percentage               1.00%  
Royalty Term               21 years  
Royalty Payment, Annual Minimum               $ 20,000  
Other Commitment, Total         191,393        
Legal Fees       $ 15,393          
Accounts Payable, Other, Current       176,000     $ 176,000    
Accrued Royalties, Current       $ 140,000     140,000    
Other Expenses, Total             $ 36,000    
Extinguishment of Debt, Amount     $ 120,000            
Accrued Patent Costs, Current     36,000            
Payments for Royalties   $ 20,000 20,000            
Payment for Contingent Consideration Liability, Operating Activities     240,000            
Contingent Payments Annual Increase     20,000            
Payments to Acquire Intangible Assets   $ 36,000              
Finite-Lived Intangible Assets, Period Increase (Decrease), Total     $ (120,000)            
Clinical Trial Agreement [Member] | MD Anderson [Member]                  
Long Term Contract, Estimated Cost         $ 2,000,000        
Research Agreement [Member] | MD Anderson [Member]                  
Long Term Contract, Estimated Cost $ 2,000,000