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Note 20 - Regulatory Restrictions (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
   
 
Actual
    
For Capital
Adequacy Purposes
    
To Be Well-
Capitalized
  
   
Amount
    
Ratio
    
Amount
    
Ratio
    
Amount
    
Ratio
  
December 31, 2019
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Total Capital (to risk weighted assets)
   $
78,652
      
13.53
 %   $
46,499
      
8.00
 %   $
58,124
      
10.00
 %
Tier 1 Capital (to risk weighted assets)
   $
74,726
      
12.86
 %   $
34,874
      
6.00
 %   $
46,499
      
8.00
 %
Common Equity Tier 1 (to risk weighted assets)
   $
74,726
      
12.86
 %   $
26,156
      
4.50
 %   $
37,780
      
6.50
 %
Tier 1 Capital (to average total assets)
   $
74,726
      
10.80
 %   $
27,680
      
4.00
 %   $
34,599
      
5.00
 %
                                                 
December 31, 2018
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Total Capital (to risk weighted assets)
   $
71,424
      
13.00
 %   $
43,943
      
8.00
 %   $
54,929
      
10.00
 %
Tier 1 Capital (to risk weighted assets)
   $
67,899
      
12.36
 %   $
32,958
      
6.00
 %   $
43,943
      
8.00
 %
Common Equity Tier 1 (to risk weighted assets)
   $
67,899
      
12.36
 %   $
24,718
      
4.50
 %   $
35,704
      
6.50
 %
Tier 1 Capital (to average total assets)
   $
67,899
      
10.08
 %   $
26,932
      
4.00
 %   $
33,664
      
5.00
 %