Note 10 - Income Taxes - Reconciliations of Federal Statutory Rate to Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Tax provision at U.S. federal statutory rates	21.00%	21.00%
State income taxes net of federal benefit	(5.50%)	2.10%
Deferred tax asset adjustments – NOL related	0.00%	0.00%
Non-deductible permanent items	(1.10%)	(1.10%)
Stock options	(4.30%)	(28.00%)
PPP Debt Forgiveness	4.90%	0.00%
Change in valuation allowance	(15.20%)	5.80%
Effective income tax rate	(0.20%)	(0.20%)