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Note 20 - Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Related Party Transactions [Table Text Block]
   
Year ended December 31,
  
   
2019
    
2018
    
2017
  
                         
Balance, beginning of year
   $
5,797,809
     $
6,528,933
     $
5,822,136
  
New Loans
    
500,000
      
2,795,734
      
1,523,847
  
Repayments
    
(2,266,965
 )    
(3,526,858
 )    
(817,050
 )
                         
Balance, end of year
   $
4,030,844
     $
5,797,809
     $
6,528,933