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Note 18 - Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
   
201
8
    
2017
    
2016
  
                         
Interest Expense
  
$
8,186,946
     $
6,851,541
     $
6,529,615
  
                         
Income Taxes
  
$
2,695,000
     $
4,000,000
     $
3,365,000
  
Schedule of Other Significant Noncash Transactions [Table Text Block]
   
201
8
    
2017
    
2016
  
                         
Acquisitions of Real Estate Through Loan Foreclosures
  
$
792,459
     $
1,724,936
     $
5,664,554
  
                         
Change in Unrealized Gain (Loss) on AFS Investment Securities
  
$
(2,149,545
)
   $
(608,355
 )   $
(890,590
 )