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Note 10 - Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
(Dollar amounts in thousands)
  
December 31, 2020
    
December 31, 2019
  
   
Amount
    
Ratio
    
Amount
    
Ratio
  
Total capital to risk-weighted assets:
      
 
      
 
      
 
      
 
Actual
   $
84,583
      
12.71
 %   $
80,418
      
13.74
 %
For capital adequacy purposes
    
53,255
      
8.00
 %    
46,836
      
8.00
 %
To be well capitalized
    
66,569
      
10.00
 %    
58,544
      
10.00
 %
Tier 1 capital to risk-weighted assets:
      
 
      
 
      
 
      
 
Actual
   $
76,246
      
11.45
 %   $
73,862
      
12.62
 %
For capital adequacy purposes
    
39,941
      
6.00
 %    
35,127
      
6.00
 %
To be well capitalized
    
53,255
      
8.00
 %    
46,836
      
8.00
 %
Common Equity Tier 1 capital to risk-weighted assets:
      
 
      
 
      
 
      
 
Actual
   $
76,246
      
11.45
 %   $
73,862
      
12.62
 %
For capital adequacy purposes
    
29,956
      
4.50
 %    
26,345
      
4.50
 %
To be well capitalized
    
43,270
      
6.50
 %    
38,054
      
6.50
 %
Tier 1 capital to average assets:
      
 
      
 
      
 
      
 
Actual
   $
76,246
      
7.58
 %   $
73,862
      
8.17
 %
For capital adequacy purposes
    
40,213
      
4.00
 %    
36,146
      
4.00
 %
To be well capitalized
    
50,267
      
5.00
 %    
45,182
      
5.00
 %