Note 9 - Income Taxes - Components of Income Tax (Benefit) Expense Recorded Directly to Stockholders' Equity (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Unrealized (loss) gain on securities available for sale	$ 1,757	$ (812)	$ (531)
Reclassification adjustment for securities losses realized in income	0	0	81
Unrealized gain on derivatives	(120)	46	112
Minimum pension liability adjustment	(58)	46	(9)
Total income tax (benefit) expense recorded directly to stockholders' equity	$ 1,579	$ (720)	$ (347)

The sum of the tax effects of all items occurring during the period that have been charged or credited directly to other comprehensive income or to related components of shareholders' equity.

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Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount of tax expense (benefit), before reclassification adjustments, related to increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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