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Note 20 - Regulatory Matters - Comparison of Capital of Company and Bank with Minimum Regulatory Guidelines (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Total Capital (to Risk-Weighted Assets), actual amount $ 125,934   $ 91,243
Total Capital (to Risk-Weighted Assets), actual ratio 0.1476 0.1582  
Total Capital (to Risk-Weighted Assets), minimum capital requirement amount $ 68,237 $ 46,129  
Total Capital (to Risk-Weighted Assets), minimum capital requirement ratio 0.0800 0.0800  
Total Capital (to Risk-Weighted Assets), minimum to be well capitalized under prompt corrective action provisions, amount $ 85,296 $ 57,661  
Total Capital (to Risk-Weighted Assets), minimum to be well capitalized under prompt corrective action provisions, ratio 0.1000 0.1000  
Tier 1 Capital (to Risk-Weighted Assets), actual amount $ 120,224   84,032
Tier 1 Capital (to Risk-Weighted Assets), actual ratio 0.1409 0.1457  
Tier 1 Capital (to Risk-Weighted Assets), minimum capital requirement amount $ 51,178 $ 34,597  
Tier 1 Capital (to Risk-Weighted Assets), minimum capital requirement ratio 0.0600 0.0600  
Tier 1 Capital (to Risk-Weighted Assets), minimum to be well capitalized under prompt corrective action provisions, amount $ 68,237 $ 46,129  
Tier 1 Capital (to Risk-Weighted Assets), minimum to be well capitalized under prompt corrective action provisions, ratio 0.0800 0.0800  
Common Equity Tier 1 Capital (to Risk-Weighted Assets), actual amount $ 120,224   84,032
Common Equity Tier 1 Capital (to Risk-Weighted Assets), actual ratio 0.1409 0.1457  
Common Equity Tier 1 Capital (to Risk-Weighted Assets), minimum capital requirement amount $ 38,383 $ 25,948  
Common Equity Tier 1 Capital (to Risk-Weighted Assets), minimum capital requirement ratio 4.50% 4.50%  
Common Equity Tier 1 Capital (to Risk-Weighted Assets), minimum to be well capitalized under prompt corrective action provisions, amount $ 55,442 $ 37,480  
Common Equity Tier 1 Capital (to Risk-Weighted Assets), minimum to be well capitalized under prompt corrective action provisions, ratio 6.50% 6.50%  
Tier 1 Capital (to Average Assets), actual amount $ 120,224   $ 84,032
Tier 1 Capital (to Average Assets), actual ratio 0.0882 0.0880  
Tier 1 Capital (to Average Assets), minimum capital requirement amount $ 54,497 $ 38,187  
Tier 1 Capital (to Average Assets), minimum capital requirement ratio 0.0400 0.0400  
Tier 1 Capital (to Average Assets), minimum to be well capitalized under prompt corrective action provisions, amount $ 68,121 $ 47,733  
Tier 1 Capital (to Average Assets), minimum to be well capitalized under prompt corrective action provisions, ratio 0.0500 0.0500