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Note 4 - Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Related Party Transactions [Table Text Block]
   
2018
    
2017
  
                 
Balance, beginning of year
  
$
15,577,316
     $
12,782,233
  
Additions
  
 
2,069,000
      
5,921,920
  
Amounts collected
  
 
(2,669,653
)
    
(3,126,837
 )
Change in related parties
  
 
(1,021,566
)
    
-
  
Balance, end of year
  
$
13,955,097
     $
15,577,316