Note 2 - INVESTMENT SECURITIES - Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Securities held to maturity:
Securities held to maturity, less than 12 months, fair value		$ 8,407
Securities held to maturity, less than 12 months, gross unrealized losses		(248)
Securities held to maturity, 12 months or more, fair value	$ 8,019
Securities held to maturity, 12 months or more, gross unrealized losses	(91)
Securities held to maturity, fair value	8,019	8,407
Securities held to maturity, gross unrealized losses	(91)	(248)
Securities available for sale:
Securities available for sale, less than 12 months, fair value	107,091	57,742
Securities available for sale, less than 12 months, gross unrealized losses	(2,806)	(485)
Securities available for sale, 12 months or more, fair value	2,155	9,945
Securities available for sale, 12 months or more, gross unrealized losses	(3)	(39)
Securities available for sale, fair value	109,246	67,687
Securities available for sale, gross unrealized losses	(2,809)	(524)
Municipal securities
Securities available for sale:
Securities available for sale, less than 12 months, fair value	68,407	10,110
Securities available for sale, less than 12 months, gross unrealized losses	(1,622)	(48)
Securities available for sale, fair value	68,407	10,110
Securities available for sale, gross unrealized losses	(1,622)	(48)
U.S. govt. sponsored agency securities
Securities available for sale:
Securities available for sale, less than 12 months, fair value	2,963	3,199
Securities available for sale, less than 12 months, gross unrealized losses	(265)	(47)
Securities available for sale, fair value	2,963	3,199
Securities available for sale, gross unrealized losses	(265)	(47)
Residential mortgage-backed and related securities
Securities available for sale:
Securities available for sale, less than 12 months, fair value	35,721	37,549
Securities available for sale, less than 12 months, gross unrealized losses	(919)	(338)
Securities available for sale, 12 months or more, fair value	157
Securities available for sale, 12 months or more, gross unrealized losses	(1)
Securities available for sale, fair value	35,878	37,549
Securities available for sale, gross unrealized losses	(920)	(338)
Asset-backed securities
Securities available for sale:
Securities available for sale, less than 12 months, fair value		6,884
Securities available for sale, less than 12 months, gross unrealized losses		(52)
Securities available for sale, 12 months or more, fair value	1,998	9,945
Securities available for sale, 12 months or more, gross unrealized losses	(2)	(39)
Securities available for sale, fair value	1,998	16,829
Securities available for sale, gross unrealized losses	$ (2)	$ (91)

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