Note 8 - Income Taxes - Components of Income Tax (Benefit) Expense Recorded Directly to Stockholders' Equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Unrealized (loss) gain on securities available for sale	$ (812)	$ (531)	$ (1,171)
Reclassification adjustment for securities losses realized in income		81
Reclassification adjustment for securities impairment realized in income
Unrealized (loss) gain on derivatives	46	112	24
Minimum pension liability adjustment	46	(9)	1
Compensation expense for tax purposes in excess of amounts recognized for financial reporting purposes			(1,705)
Total income tax (benefit) expense recorded directly to stockholders’ equity	$ (720)	$ (347)	$ (2,851)