Note 8 - Income Taxes (Details) - Components of Income Tax (Benefit) Expense Recorded Directly to Stockholders’ Equity - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of Income Tax (Benefit) Expense Recorded Directly to Stockholders’ Equity [Abstract]
Unrealized (loss) gain on securities available for sale	$ (840)	$ 2,383	$ (4,234)
Reclassification adjustment for securities losses realized in income	0	3	2
Reclassification adjustment for securities impairment realized in income	36	0	0
Unrealized (loss) gain on derivatives	(41)	0	8
Compensation expense for tax purposes in excess of amounts recognized for financial reporting purposes	(673)	(378)	(265)
Minimum pension liability adjustment	61	(69)	111
Total income tax (benefit) expense recorded directly to stockholders' equity	$ (1,456)	$ 1,939	$ (4,378)