Note 3 - Summary of Significant Accounting Policies - Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net loss available to common shareholders	$ (696,760)	$ (2,261,085)
Weighted average number of common shares outstanding – basic (in shares)	7,444,732	5,469,908
Effect of dilutive securities (in shares)	0	0
Diluted weighted-average shares outstanding (in shares)	7,444,732	5,469,908
Net income loss per share – basic (in dollars per share)	$ (0.09)	$ (0.41)
Net income loss per share – diluted (in dollars per share)	$ (0.09)	$ (0.41)