Note 7 - Concentrations - Customers Representing 5% or More of Total Revenue (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Major Customers 1 [Member]
1	$ 13,269	$ 21,743
Major Customers 2 [Member]
1	10,893	19,307
Major Customers 3 [Member]
1	8,361	18,855
Major Customers 4 [Member]
1	8,095	18,650
Major Customers 5 [Member]
1	$ 7,403	$ 14,936