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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, Year One 187,056   187,056   182,000  
Lessee, Operating Lease, Liability, to be Paid, Year Two $ 192,708   $ 192,708   187,000  
Lessee, Operating Lease, Liability, to be Paid, Year Three         $ 193,000