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Note 13 - Regulatory Capital and Oversight (Tables)
 6 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
   

Actual

    

Required to be
Adequately Capitalized

    

Excess Capital

    

To Be Well Capitalized
Under Prompt
Corrective Action
Provisions

  

(Dollars in thousands)

  

Amount

    

Percent
of
Assets(1)

    

Amount

    

Percent
of
Assets(1)

    

Amount

    

Percent
of
Assets(1)

    

Amount

    

Percent
of
Assets(1)

  

Common equity Tier 1 capital

   $ 101,791       12.85

%

   $ 35,657       4.50

%

   $ 66,134       8.35

%

   $ 51,505       6.50

%

Tier 1 leverage

     101,791       9.71       41,932       4.00       59,859       5.71       52,415       5.00  

Tier 1 risk-based capital

     101,791       12.85       47,543       6.00       54,248       6.85       63,391       8.00  

Total risk-based capital

     111,435       14.06       63,391       8.00       48,044       6.06       79,238       10.00