Note 9 - Income Taxes - Components of Income Tax Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Current provision:
Federal	$ 0	$ 0
State	280,000	279,861
Current Income Tax Expense (Benefit), Total	280,000	279,861
Deferred provision:
Federal expense (benefit)	0	(110,000)
Expense for income taxes	$ 280,000	$ 169,861