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Note 13 - Financial Instruments With Off-balance Sheet Risk (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]
   
December 31,
   
2019
 
2018
Financial instruments whose contract amounts represent credit risk:
               
Commitments to extend credit
 
$
158,859
    $
145,635
 
Standby letters of credit
 
 
15,212
     
16,092
 
Mortgage loans sold with potential recourse
 
 
20,496
     
13,013