Note 6 - Property, Plant and Equipment, Net - Schedule of Property, Plant, and Equipment (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Property Plant and Equipment, Gross	$ 26,902,597	$ 26,754,937
Less: accumulated depreciation	12,137,816	11,541,494
Property plant & equipment, net	14,764,781	15,213,443
Land [Member]
Property Plant and Equipment, Gross	231,034	231,034
Building and Building Improvements [Member]
Property Plant and Equipment, Gross	3,293,464	3,222,243
Machinery and Equipment [Member]
Property Plant and Equipment, Gross	$ 23,378,099	$ 23,301,660

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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