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Note 4 - Commitments (Details Textual) - Office and Laboratory Lease Agreement [Member]
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
ft²
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
ft²
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
ft²
Dec. 31, 2021
USD ($)
Area of Real Estate Property | ft² 8,400   8,400   8,400  
Operating Lease, Expense $ 45,414 $ 44,089 $ 136,242 $ 132,267 $ 176,797 $ 166,242
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 45,414   45,414      
Lessee, Operating Lease, Liability, to be Paid, Year One 187,056   187,056   182,000  
Lessee, Operating Lease, Liability, to be Paid, Year Two $ 192,708   $ 192,708   $ 187,000