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Note 18 - Revenue Recognition (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   
Year ended December 31,
  
   
2020
     2019    
2018
  
Service charges on deposit accounts
   $
1,102
     $
1,486
     $
1,610
  
Gain on sale of loans (1)
    
24,139
      
9,071
      
4,675
  
Net securities gains (losses) (1)
    
289
      
4
      
(6
 )
Change in fair value of mortgage servicing rights (1)
    
(293
 )    
(258
 )    
26
  
Increase in cash surrender value of life insurance (1)
    
368
      
390
      
395
  
Credit and debit card interchange fees
    
1,514
      
1,443
      
1,388
  
Litigation settlement (1)
    
-
      
1,980
      
-
  
Wealth management
    
319
      
293
      
237
  
Net loan servicing fees (1)
    
262
      
327
      
375
  
Other non-interest income
    
(700
 )    
312
      
728
  
Total non-interest income
   $
27,000
     $
15,048
     $
9,428