Note 3 - Investment Securities - Amortized Cost and Fair Value of Investment Securities Classified as AFS (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Amortized Cost	$ 356,639	$ 263,913
Gross Unrealized Gains	1,935	4,916
Gross Unrealized Losses	(3,065)	(419)
Fair Value	355,509	268,410
US Government Corporations and Agencies Securities [Member]
Amortized Cost	21,143	36,648
Gross Unrealized Gains	152	201
Gross Unrealized Losses	(27)	(28)
Fair Value	21,268	36,821
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	32,330	21,650
Gross Unrealized Gains	468	490
Gross Unrealized Losses	(213)	(3)
Fair Value	32,585	22,137
Corporate Debt Securities [Member]
Amortized Cost	27,777	27,583
Gross Unrealized Gains	235	348
Gross Unrealized Losses	(345)	(223)
Fair Value	27,667	27,708
Residential Mortgage Backed Securities [Member]
Amortized Cost	200,696	119,934
Gross Unrealized Gains	711	2,675
Gross Unrealized Losses	(1,503)	(11)
Fair Value	199,904	122,598
Commercial Mortgage Backed Securities [Member]
Amortized Cost	74,693	58,098
Gross Unrealized Gains	369	1,202
Gross Unrealized Losses	(977)	(154)
Fair Value	$ 74,085	$ 59,146

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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