Note 3 - Investment Securities: Schedule of amortized cost and estimated fair values of debt securities (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Amortized Cost Basis	$ 143,319,546	$ 138,253,453
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	150,714,281	143,862,165
Held to Maturity, at amortized cost	16,614,957	17,058,181
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Amortized Cost Basis	143,189,230	138,123,137
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	150,404,156	143,533,384
Held to Maturity, at amortized cost	16,614,957	17,058,181
Held-to-maturity Securities, Fair Value	16,670,001	17,171,053
Corporate Debt Securities
Available-for-sale Securities, Amortized Cost Basis	130,316	130,316
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 310,125	$ 328,781