Note 4 - Income Taxes - Reconciliation of Income Taxes Computed at Statutory Federal Income Tax Rate (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Federal tax expense at statutory rates	$ 637,700	$ 3,145,900
Nondeductible lobbying expense	32,000	30,200
State expense, net of federal impact	275,700	1,204,200
Other	(26,415)	89,200
Total income tax expense	923,885	4,417,000
Share-Based Payment Arrangement, Option [Member]
Stock-based compensation expense	$ 4,900	$ (52,500)