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Note 16 - Guarantees, Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]
   
September
30
,
2018
   
December
31,
2017
 
   
(Dollars in Thousands)
 
Standby letters of credit
  $
916
    $
180
 
Commitments to extend credit
  $
72,232
    $
55,801