Note 6 - Loans Payable (Details Textual) - Loan payable to Bank Direct Capital Finance [Member] - Loans Payable [Member] - USD ($)	1 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument, Face Amount	$ 1,300,000	$ 1,100,000
Debt Instrument, Interest Rate, Stated Percentage	3.37%	3.90%
Debt Instrument, Periodic Payment, Total	$ 147,000	$ 126,000
Loans Payable to Bank, Total			$ 300,000	$ 300,000