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Note 15 - Guarantees, Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]
   
March
3
1
,
201
9
    
December
31,
201
8
  
   
(Dollars in Thousands)
  
Standby letters of credit
   $
180
     $
180
  
Standby performance letters of credit   $
652
     $
704
  
Commitments to extend credit
   $
96,331
     $
85,972