Note 21 - Accumulated Other Comprehensive Income (Loss) - Changes in Each Component of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Balance	$ 66,674	$ 58,154
Unrealized holding losses, net of tax	2,873	(752)
Reclassification adjustment, net of tax	(1)	1
Unrealized holding losses transferred from held to maturity to available for sale, net of tax	(340)
Total other comprehensive income (loss)	2,532	(850)
Balance	77,219	66,674
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	(1,808)	(1,057)
Unrealized holding losses, net of tax	2,873	(752)
Reclassification adjustment, net of tax	(1)	1
Change during period		(751)
Unrealized holding losses transferred from held to maturity to available for sale, net of tax	(340)
Total other comprehensive income (loss)	2,532
Balance	724	(1,808)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance		99
Unrealized holding losses, net of tax
Pension liability adjustment, net of tax		(99)
Change during period		(99)
Total other comprehensive income (loss)
Balance
AOCI Attributable to Parent [Member]
Balance	(1,808)	(958)
Unrealized holding losses, net of tax	2,873	(752)
Reclassification adjustment, net of tax	(1)	1
Pension liability adjustment, net of tax		(99)
Change during period		(850)
Unrealized holding losses transferred from held to maturity to available for sale, net of tax	(340)
Total other comprehensive income (loss)	2,532	(850)
Balance	$ 724	$ (1,808)