Note 9 - Notes Payable (Details Textual) - USD ($)	1 Months Ended	9 Months Ended
Mar. 31, 2020	Sep. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment, Gross, Ending Balance		$ 13,134,525	$ 12,708,959
Interest Expense, Debt		$ 4,130
Microscope Note Payable [Member]
Debt Instrument, Term (Year)	5 years
Debt Instrument, Periodic Payment, Total	$ 4,000
Debt Instrument, Interest Rate, Stated Percentage	6.47%
Sonoscan Ultrasound Microscope [Member]
Property, Plant and Equipment, Gross, Ending Balance	$ 208,000

Contractual interest rate for funds borrowed, under the debt agreement.

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