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Note P - Regulatory Matters - Capital Requirements (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2014
Total capital $ 118,456 $ 113,515  
Total capital to risk weighted assets 16.60% 16.40%  
Total capital for capital adequacy 8.00%    
Common equity tier 1 $ 102,457 $ 97,316  
Common equity tier 1 capital to risk weighted assets 14.30% 14.00%  
Common equity tier 1 capital for capital adequacy 4.50%    
Tier 1 capital $ 110,957 $ 105,816  
Tier 1 capital to risk weighted assets 15.50% 15.30%  
Teir 1 capital for capital adequacy 6.00%   4.00%
Tier 1 capital average $ 110,957 $ 105,816  
Tier 1 capital average to risk weighted assets 11.00% 11.20%  
Teir 1 capital average for capital adequacy 4.00%    
Bank [Member]      
Total capital $ 107,929 $ 104,317  
Total capital to risk weighted assets 15.30% 15.30%  
Total capital for capital adequacy 8.00% 8.00%  
Total capital for well capitalized to risk weighted assets 10.00% [1] 10.00%  
Common equity tier 1 $ 100,759 $ 96,946  
Common equity tier 1 capital to risk weighted assets 14.30% 14.20%  
Common equity tier 1 capital for capital adequacy 4.50% 4.50%  
Common equity Tier 1 capital for well capitalized to risk weighted assets 6.50% [1] 6.50%  
Tier 1 capital $ 100,759 $ 96,946  
Tier 1 capital to risk weighted assets 14.30% 14.20%  
Teir 1 capital for capital adequacy 6.00% 6.00%  
Tier 1 capital for well capitalized to risk weighted assets 8.00% [1] 8.00%  
Tier 1 capital average $ 100,759 $ 96,946  
Tier 1 capital average to risk weighted assets 10.10% 10.40%  
Teir 1 capital average for capital adequacy 4.00% 4.00%  
Tier 1 capital average for well capitalized to average assets 5.00% [1] 5.00%  
Total capital for capital adequacy to risk weighted assets   $ 68,289  
Common equity Tier 1 capital for well capitalized   44,388  
Tier 1 capital for well capitalized   54,631  
Tier 1 capital average for well capitalized   $ 46,461  
[1] For the Company, these amounts are required to engage in activities permissible only for a bank holding company that meets the financial holding company requirements. For the Bank, these are the amounts required for the Bank to be deemed well capitalized under the prompt corrective action regulations.