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Note 9 - Income Taxes (Details) - Difference Between Financial Statement Tax Expense and Amount Computer by Applying Statutory Federal Tax Rate to Income Before Income Taxes - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Difference Between Financial Statement Tax Expense and Amount Computer by Applying Statutory Federal Tax Rate to Income Before Income Taxes [Abstract]
Statutory Federal Income Taxes	$ 4,134,570	$ 3,671,971	$ 2,367,729
Tax-Exempt Interest	(83,903)	(74,138)	(104,307)
Premiums on Officers’ Life Insurance	(232,988)	(186,712)	(111,749)
Meal and Entertainment Disallowance	21,600	14,044	15,319
Other	(51,476)	(156,878)	167,872
Actual Federal Income Taxes	$ 3,787,803	$ 3,268,287	$ 2,334,864

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Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible life insurance expense.

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