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Note 5 - Major Classes of Property, Plant and Equipment (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Land [Member]    
Property, plant and equipment, gross $ 2,220,000 $ 2,220,000
Building [Member]    
Property, plant and equipment, gross 6,631,039 6,631,039
Building Improvements [Member]    
Property, plant and equipment, gross 5,615,823 5,577,248
Machinery and Equipment [Member]    
Property, plant and equipment, gross 2,381,964 2,333,129
Furniture and Fixtures [Member]    
Property, plant and equipment, gross 721,919 712,549
Computer Equipment [Member]    
Property, plant and equipment, gross 701,367 636,819
Transportation Equipment [Member]    
Property, plant and equipment, gross 65,994 65,994
Lab Equipment [Member]    
Property, plant and equipment, gross 1,972,838 1,564,082
Property, plant and equipment, gross 20,310,944 19,740,860
Less: Accumulated depreciation and amortization (5,517,021) (4,715,577)
Property, plant, and equipment, net 14,793,923 15,025,283
Depreciation and amortization [1] $ 826,529 $ 797,928
[1] Includes amortization expense of $24,759 and $20,007 for the years ending December 31, 2015 and 2014, respectively. Such amortization expense relates to other capitalized and intangible assets.