Note 6 - Property, Plant and Equipment, Net - Schedule of Property, Plant, and Equipment (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Property Plant and Equipment, Gross	$ 25,134,991	$ 24,805,224
Less: accumulated depreciation	9,730,186	9,196,022
Property plant & equipment, net	15,404,805	15,609,202
Land [Member]
Property Plant and Equipment, Gross	231,034	231,034
Building and Building Improvements [Member]
Property Plant and Equipment, Gross	3,164,362	2,961,431
Machinery and Equipment [Member]
Property Plant and Equipment, Gross	$ 21,739,595	$ 21,612,759

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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