Note 9 - Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Allowance for loan losses and unearned fee income	$ 1,597	$ 1,683
Valuation allowance on other real estate owned	186	223
Defined benefit plan	2,281	1,864
Deferred compensation and other liabilities	848	1,308
Net unrealized loss on securities available for sale		1,348
Lease accounting	2
Total deferred tax assets	4,914	6,426
Deferred tax liabilities:
Fixed assets	(438)	(365)
Goodwill and deposit intangibles	(1,228)	(1,169)
Defined benefit plan, prepaid portion	(1,308)	(1,465)
Net unrealized gain on securities available for sale	(20)
Discount accretion of securities	(43)	(70)
Total deferred tax liabilities	(3,037)	(3,069)
Net deferred tax assets	$ 1,877	$ 3,357