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Note 6 - Other Comprehensive Loss (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
           
Accumulated
 
   
Foreign
   
Other
 
   
Currency
   
Comprehensive
 
   
Items
   
Loss
 
Beginning balance
  $
(6,050,347
)
  $
(6,050,347
)
Current period change
   
701,535
     
701,535
 
Ending balance
  $
(5,348,812
)
  $
(5,348,812
)
           
Accumulated
 
   
Foreign
   
Other
 
   
Currency
   
Comprehensive
 
   
Items
   
Loss
 
Beginning balance
  $
(5,365,364
)
  $
(5,365,364
)
Current period change
   
(684,983
     
(684,983
 
Ending balance
  $
(6,050,347
)
  $
(6,050,347
)