Note 11 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income tax (benefit) at 21%	$ (610,000)	$ (1,074,000)
Change in valuation allowance	(2,470,000)	1,102,000
Permanent and other differences	3,080,000	(28,000)
Alternative minimum tax and state taxes	118,057	101,888
Expense for income taxes	$ 118,057	$ 101,888