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Note 4 - Financial Instruments With Off-balance-sheet Risk (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]
   
March 31,
2019
   
December 31,
2018
 
                 
Commitments to originate and sell mortgage loans
 
$
35,428,610
    $
34,268,309
 
Commitments to extend credit
 
 
41,375,723
     
25,323,822
 
Unused lines of credit
 
 
19,231,789
     
18,281,453
 
Standby letters of credit
 
 
-
     
-
 
Totals
 
$
96,036,122
    $
77,873,584