Note 1 - Description of Business and Summary of Significant Accounting Policies - Summary of Deferred Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Deferred revenues, beginning of period	$ 66,572	$ 123,529
Deferred revenues, end of period	17,647	66,572
Revenue recognized in the period from amounts included in deferred revenues at the beginning of the period	$ 48,925	$ 56,957