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Note 4 - Commitments (Details Textual)
 3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
ft²
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
ft²
Jun. 30, 2021
USD ($)
Licensing Agreement, Future Minimum Payments Receivable, Current $ 124,200   $ 124,200  
Licensing Agreement, Future Minimum Payments Receivable, in Two Years 127,500   127,500  
Licensing Agreement, Future Minimum Payments Receivable, in Three Years 127,500   127,500  
Licensing Agreement, Future Minimum Payments Receivable, in Four Years 27,500   27,500  
Licensing Agreement, Future Minimum Payments Receivable, in Five Years 27,500   27,500  
Unrecorded Unconditional Purchase Obligation, Total $ 1,082,000   $ 1,082,000  
Office and Laboratory Lease Agreement [Member]        
Area of Real Estate Property (Square Foot) | ft² 8,400   8,400  
Operating Lease, Expense $ 44,089 $ 42,803 $ 88,178 $ 85,607
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year $ 88,178   $ 88,178