Note 4 - Property and Equipment - Property and Equipment, Net (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Property, plant, and equipment, gross	$ 399,513	$ 387,665
Less accumulated depreciation and amortization	(387,665)	(387,665)
Property and equipment, net	11,848	0
Medical Equipment [Member]
Property, plant, and equipment, gross	387,665	387,665
Office Equipment [Member]
Property, plant, and equipment, gross	3,243	0
Warehouse and Production Equipment [Member]
Property, plant, and equipment, gross	$ 8,605	$ 0

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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