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Note 3 - Property, Plant and Improvements, Net (Tables)
 6 Months Ended
Jun. 30, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
June 30,
2020
    
December 31,
2019
  
Leasehold improvements
   $
166,163
     $
166,163
  
Furniture and equipment
    
17,668
      
17,668
  
Accumulated depreciation
    
(44,898
 )    
(35,706
 )
                 
Net property, plant and improvements
   $
138,933
     $
148,125