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Note 5 - Property, Plant and Equipment - Major Classes of Property, Plant and Equipment (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Property, plant and equipment, gross $ 40,053,731 $ 37,376,110
Less: Accumulated depreciation and amortization (7,951,396) (6,973,552)
Property, plant and equipment, net 32,102,335 30,402,558
Depreciation and amortization [1] 1,042,829 1,141,161
Land [Member]    
Property, plant and equipment, gross 6,929,000 6,929,000
Building [Member]    
Property, plant and equipment, gross 15,917,000 15,920,925
Building Improvements [Member]    
Property, plant and equipment, gross 7,864,757 6,603,121
Machinery and Equipment [Member]    
Property, plant and equipment, gross 3,592,351 3,385,357
Furniture and Fixtures [Member]    
Property, plant and equipment, gross 613,765 611,190
Computer Equipment [Member]    
Property, plant and equipment, gross 487,902 487,007
Software Development [Member]    
Property, plant and equipment, gross 438,391 441,376
Transportation Equipment [Member]    
Property, plant and equipment, gross 114,511 65,995
Lab Equipment [Member]    
Property, plant and equipment, gross 1,985,179 1,985,179
Construction in Progress [Member]    
Property, plant and equipment, gross $ 2,110,875 $ 946,960
[1] Includes amortization expense of $120,488 and $115,800 for the year ending December 31, 2019 and the year ended December 31, 2018, respectively. Such amortization expense relates to other capitalized and intangibles assets.