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Note J - Shareholders' Equity (Details Textual) - USD ($)
2 Months Ended 3 Months Ended 12 Months Ended 13 Months Ended
Nov. 08, 2019
Apr. 24, 2019
Sep. 26, 2018
Apr. 25, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2018
Jan. 01, 2019
Dec. 08, 2017
Undistributed Earnings of Bank Subsidiaries         $ 13,703,377          
Stock Repurchased and Retired During Period, Value             $ 1,907,000      
Dividends Payable, Amount Per Share $ 0.02 $ 0.01 $ 0.01 $ 0.01            
Dividends Payable, Date Declared Nov. 08, 2019 Apr. 24, 2019 Sep. 26, 2018 Apr. 25, 2018            
Dividends Payable, Date to be Paid Nov. 25, 2019 May 10, 2019 Oct. 15, 2018 May 10, 2018            
Dividends Payable, Date of Record Nov. 20, 2019 May 06, 2019 Oct. 09, 2018 May 07, 2018            
Subsidiaries [Member]                    
Capital Required to be Well Capitalized to Risk Weighted Assets         10.00% 10.00% 10.00% 10.00%    
Common Equity Tier One Capital Required to be Well-Capitalized to Risk Weighted Assets         6.50% 6.50% 6.50% 6.50%    
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets         8.00% 8.00% 8.00% 8.00%    
Tier One Leverage Capital Required to be Well Capitalized to Average Assets         5.00% 5.00% 5.00% 5.00%    
Capital Conservation Buffer Rate                 2.50%  
December 8, 2017 Share Repurchase Program [Member]                    
Stock Repurchase Program, Number of Shares Authorized to be Repurchased                   110,000
Stock Repurchased and Retired During Period, Shares               110,000    
Stock Repurchased and Retired During Period, Value               $ 1,477,000    
September 26, 2018 Share Repurchase Program [Member]                    
Stock Repurchase Program, Number of Shares Authorized to be Repurchased     70,000              
Stock Repurchased and Retired During Period, Shares           70,000        
Stock Repurchased and Retired During Period, Value           $ 933,000        
November 8, 2019 Share Repurchase Program [Member]                    
Stock Repurchase Program, Number of Shares Authorized to be Repurchased 65,000                  
Stock Repurchased and Retired During Period, Shares         0