Note 6 - Furniture and Equipment - Summary of Property and Equipment (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Property, plant and equipment, gross	$ 159,147	$ 156,727
Less: accumulated depreciation	120,815	101,539
Furniture and equipment, net	38,332	55,188
Machinery and Equipment [Member]
Property, plant and equipment, gross	75,137	75,137
Office Furniture [Member]
Property, plant and equipment, gross	$ 84,010	$ 81,590