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Note 5 - Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
201
9
    
201
8
  
                 
Land
   $
6,929,000
     $
6,929,000
  
Buildings
    
15,917,000
      
15,920,925
  
Building improvements
    
7,864,757
      
6,603,121
  
Machinery and equipment
    
3,592,351
      
3,385,357
  
Furniture and fixtures
    
613,765
      
611,190
  
Computer equipment
    
487,902
      
487,007
  
Software
    
438,391
      
441,376
  
Transportation equipment
    
114,511
      
65,995
  
Lab equipment
    
1,985,179
      
1,985,179
  
Construction in Progress
    
2,110,875
      
946,960
  
Totals at cost
   $
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 expense (1)
   $
1,042,829
     $
1,141,161