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Note 11 - Income Taxes - Schedule of Effective Income Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Income tax expense at federal statutory rate									$ 892	$ 475
Increase (decrease) resulting from:
Tax-exempt interest									(219)	(217)
Bank-owned life insurance									(109)	(106)
State income tax expense, net of federal income taxes									54	29
Tax Reform adjustment									2,471
Other									(54)	(12)
Total	$ 2,600	$ 173	$ 132	$ 130	$ (237)	$ 162	$ 144	$ 100	$ 3,035	$ 169

X

- Definition

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 deductible life insurance expense.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to 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 increase (decrease) in the income tax rates.

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