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Note 11 - Financial Instruments With Off-balance Sheet Risk (Tables)
 3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Commitment to Extended Credit [Table Text Block]
   
March 31,
    
December 31,
  
(In thousands)
  
2021
    
2020
  
Commitments to extend credit:
  
 
 
 
  
 
 
 
Unused lines of credit
   $
62,473
     $
61,622
  
Undisbursed construction loans
    
19,302
      
25,232
  
Home equity lines of credit
    
18,779
      
19,240
  
Future loan commitments
    
27,645
      
15,696
  
Financial standby letters of credit
    
564
      
604
  
    $
128,763
     $
122,394