Note 6 - Property, Plant and Equipment, Net - Schedule of Property, Plant, and Equipment (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Property Plant and Equipment, Gross	$ 22,915,129	$ 16,620,221
Less: accumulated depreciation	7,628,872	5,329,438
Property plant & equipment, net	15,286,257	11,290,783
Land [Member]
Property Plant and Equipment, Gross	228,872	228,872
Building and Building Improvements [Member]
Property Plant and Equipment, Gross	2,434,882	2,061,887
Machinery and Equipment [Member]
Property Plant and Equipment, Gross	$ 20,251,375	$ 14,329,462

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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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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