Note 9 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Change in valuation allowance	$ (581,000)	$ (2,322,000)
Permanent and other differences	1,715,200	2,389,543
Federal income tax (benefit)	0	(110,000)
Expense for income taxes	$ 280,000	$ 169,861