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Note 7 - Other Comprehensive Income (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
 
Foreign Currency Items
   
Total
Accumulated Other
Comprehensive Income
 
                 
Beginning balance as of January 1, 2020
  $
(5,348,812
)   $
(5,348,812
)
                 
Current period change, net of tax
   
(1,363,503)
     
(1,363,503
)
                 
Ending Balance as of March 31, 2020
   
(6,712,315
)    
(6,712,315)