Note A - Business and Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Average Reserve Balance with Federal Reserve Bank	$ 383,000	$ 527,000
Weighted Average Number of Shares Outstanding, Basic and Diluted	4,943,186	5,031,778	5,123,076
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 3,231,710	$ 2,657,616	$ 1,420,399
Income Taxes Paid, Net, Total	0	0	0
Real Estate Owned, Transfer to Real Estate Owned	1,707,389	$ 4,706,732	$ 1,946,045
Federal Home Loan Bank of Dallas [Member]
Federal Home Loan Bank, Advances, Par Value, Total	$ 100
Low Income Housing Partnership [Member]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest	99.00%