Note 1 - Description of Business and Summary of Significant Accounting Policies - Summary of Deferred Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Deferred revenues, beginning of period	$ 123,529	$ 20,000
Deferred revenues, end of period	66,572	123,529
Revenue recognized in the period from amounts included in deferred revenues at the beginning of the period	$ 56,957	$ 20,000