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Note 5 - Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2015
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
2015
    
2014
  
Land
   $ 2,220,000     $ 2,220,000  
Buildings
     6,631,039       6,631,039  
Building improvements
     5,615,823       5,577,248  
Machinery and equipment
     2,381,964       2,333,129  
Furniture and fixtures
     721,919       712,549  
Computer equipment
     701,367       636,819  
Transportation equipment
     65,994       65,994  
Lab equipment
    1,972,838       1,564,082  
Totals at cost
     20,310,944       19,740,860  
Less: Accumulated depreciation and amortization
     (5,517,021 )     (4,715,577 )
    $ 14,793,923     $ 15,025,283  
                 
Depreciation and amortization expense (1)
   $ 826,529     $ 797,928