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Note 10 - Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
(Dollar amounts in thousands)
  
December 31, 2019
    
December 31, 2018
  
   
Amount
    
Ratio
    
Amount
    
Ratio
  
Total capital to risk-weighted assets:
      
 
      
 
      
 
      
 
Actual
   $
80,418
      
13.74
 %   $
76,344
      
12.93
 %
For capital adequacy purposes
    
46,836
      
8.00
 %    
47,252
      
8.00
 %
To be well capitalized
    
58,544
      
10.00
 %    
59,065
      
10.00
 %
Tier 1 capital to risk-weighted assets:
      
 
      
 
      
 
      
 
Actual
   $
73,862
      
12.62
 %   $
69,836
      
11.82
 %
For capital adequacy purposes
    
35,127
      
6.00
 %    
35,439
      
6.00
 %
To be well capitalized
    
46,836
      
8.00
 %    
47,252
      
8.00
 %
Common Equity Tier 1 capital to risk-weighted assets:
      
 
      
 
      
 
      
 
Actual
   $
73,862
      
12.62
 %   $
69,836
      
11.82
 %
For capital adequacy purposes
    
26,345
      
4.50
 %    
26,579
      
4.50
 %
To be well capitalized
    
38,054
      
6.50
 %    
38,393
      
6.50
 %
Tier 1 capital to average assets:
      
 
      
 
      
 
      
 
Actual
   $
73,862
      
8.17
 %   $
69,836
      
7.95
 %
For capital adequacy purposes
    
36,146
      
4.00
 %    
35,126
      
4.00
 %
To be well capitalized
    
45,182
      
5.00
 %    
43,908
      
5.00
 %