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Note 6 - Regulatory Matters (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
                             
To be Well
 
                             
Capitalized Under
 
     
 
   
 
   
For Capital
   
Prompt Corrective
 
   
Actual
   
Adequacy Purposes
   
Action Provisions
 
   
Amount
 
Ratio
   
Amount
 
Ratio
   
Amount
 
Ratio
 
   
(Dollars in thousands)
 
As of September 30, 2019:
 
 
 
 
 
 
 
 
 
 
 
     
 
 
 
   
                                     
Total Capital (to Risk-Weighted Assets)
 
$
42,442
 
 
14.38
%
 
$
23,612
 
8.00
%
 
$
29,515
 
10.00
%
                                     
Tier I Capital (to Risk-Weighted Assets)
 
$
39,317
 
 
13.32
%
 
$
17,710
 
6.00
%
 
$
23,614
 
8.00
%
                                     
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
 
$
39,317
 
 
13.32
%
 
$
13,283
 
4.50
%
 
$
19,186
 
6.50
%
                                     
Tier I Capital (to Average Assets)
 
$
39,317
 
10.38
%
 
$
15,151
 
≥4.00
%
 
$
18,939
 
≥5.00
%
                                     
As of December 31, 2018:
                                   
                                     
Total Capital (to Risk-Weighted Assets)
  $
41,685
 
14.50
%   $
22,999
 
≥8.00
%   $
28,748
 
≥10.00
%
                                     
Tier I Capital (to Risk-Weighted Assets)
  $
38,703
 
13.46
%   $
17,252
 
≥6.00
%   $
23,003
 
≥8.00
%
                                     
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
  $
38,703
 
13.46
%   $
12,939
 
≥4.50
%   $
18,690
 
≥6.50
%
                                     
Tier I Capital (to Average Assets)
  $
38,703
 
10.29
%   $
15,045
 
≥4.00
%   $
18,806
 
≥5.00
%