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Note 3 - Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
Useful
Life
    
2019
    
2018
  
Production equipment
  
 3
-
10
     $
10,228,216
     $
8,492,567
  
Production equipment – finance lease
  
 3
-
10
      
1,113,412
      
1,121,622
  
Lab equipment
  
 3
-
10
      
99,831
      
82,930
  
Computer equipment
  
 3
-
5
      
484,943
      
204,807
  
Vehicles
  
 3
-
5
      
143,373
      
10,555
  
Vehicles – finance lease
  
 3
-
5
      
50,815
      
61,156
  
Furniture and fixture
  
 
5
 
      
1,202,155
      
111,417
  
Furniture and fixture – finance lease
  
 
5
 
      
198,045
      
-
  
Leasehold improvements
  
 5
-
15
      
2,121,157
      
1,037,678
  
   
 
 
 
      
15,641,947
      
11,122,732
  
Less Accumulated Depreciation
  
 
 
 
      
(9,659,850
)
    
(8,521,811
)
Less Accumulated Depreciation – finance lease
  
 
 
 
      
(1,156,145
)
    
(1,169,272
)
Net Property and Equipment
  
 
 
 
     $
4,825,952
     $
1,431,649