Note 6 - Furniture and Equipment - Summary of Property and Equipment (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Property, plant and equipment, gross	$ 156,727	$ 141,641
Less: accumulated depreciation	101,539	82,058
Furniture and equipment, net	55,188	59,583
Machinery and Equipment [Member]
Property, plant and equipment, gross	75,137	67,151
Office Furniture [Member]
Property, plant and equipment, gross	$ 81,590	$ 74,490

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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