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Note 10 - Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
(Dollar amounts in thousands)
 
December 31, 2018
  
December 31, 2017
   
Amount
  
Ratio
  
Amount
  
Ratio
Total capital to risk-weighted assets:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Actual
   $
76,344
 
    
12.93
%
   $
64,221
 
    
12.96
%
For capital adequacy purposes
    
47,252
 
    
8.00
%
    
39,630
 
    
8.00
%
To be well capitalized
    
59,065
 
    
10.00
%
    
49,537
 
    
10.00
%
Tier 1 capital to risk-weighted assets:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Actual
   $
69,836
 
    
11.82
%
   $
58,088
 
    
11.73
%
For capital adequacy purposes
    
35,439
 
    
6.00
%
    
29,722
 
    
6.00
%
To be well capitalized
    
47,252
 
    
8.00
%
    
39,630
 
    
8.00
%
Common equity Tier 1 capital to risk-weighted assets:
 
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Actual
   $
69,836
 
    
11.82
%
   $
58,088
 
    
11.73
%
For capital adequacy purposes
    
26,579
 
    
4.50
%
    
22,292
 
    
4.50
%
To be well capitalized
    
38,393
 
    
6.50
%
    
32,199
 
    
6.50
%
Tier 1 capital to average assets:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Actual
   $
69,836
 
    
7.95
%
   $
58,088
 
    
7.71
%
For capital adequacy purposes
    
35,126
 
    
4.00
%
    
30,117
 
    
4.00
%
To be well capitalized
    
43,908
 
    
5.00
%
    
37,647
 
    
5.00
%