Note 9 - Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Allowance for loan losses and unearned fee income	$ 1,683	$ 1,773
Valuation allowance on other real estate owned	223	156
Defined benefit plan	1,864	1,592
Deferred compensation and other liabilities	1,308	863
Discount accretion of securities
Net unrealized loss on securities available for sale	1,348	984
Total deferred tax assets	6,426	5,368
Deferred tax liabilities:
Fixed assets	(365)	(388)
Deposit intangibles	(1,169)	(1,059)
Defined benefit plan, prepaid portion	(1,465)	(1,579)
Discount accretion of securities	(70)	(2)
Total deferred tax liabilities	(3,069)	(3,028)
Net deferred tax assets	$ 3,357	$ 2,340