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Note 14 - Accumulated Other Comprehensive Income (Loss) (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Net Unrealized Gains (Losses) on Securities
    
Accumulated Other Comprehensive Income (Loss)
  
Balance at December 31, 2018
   $
(1,808
 )   $
(1,808
 )
Unrealized holding gains (net of tax, $407)
    
1,528
      
1,528
  
Unrealized holding losses transferred from held to maturity to available for sale (net of tax, ($91))
    
(340
 )    
(340
 )
Change during period
    
1,188
      
1,188
  
Balance at March 31, 2019
   $
(620
 )   $
(620
 )
Balance at December 31, 2019
   $
724
     $
724
  
Unrealized holding gains (net of tax, $556)
    
2,092
      
2,092
  
Change during period
    
2,092
      
2,092
  
Balance at March 31, 2020
   $
2,816
     $
2,816