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Note 15 - Commitments and Unfunded Credits (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]
   
2019
   
2018
 
Commitments to extend credit and unfunded commitments under lines of credit
  $
92,528
    $
91,109
 
Stand-by letters of credit
   
10,950
     
9,947