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Note 3 - Debt Securities - Securities Available-for-sale (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Securities available for sale, amortized cost	$ 89,388	$ 168,478
Securities available for sale, unrealized gains	1,630	1,266
Securities available for sale, unrealized losses	(46)	(170)
Securities available for sale, fair value	90,972	169,574	[1]
US Government Agencies Debt Securities [Member]
Securities available for sale, amortized cost	576	5,038
Securities available for sale, unrealized gains	0	0
Securities available for sale, unrealized losses	(4)	(4)
Securities available for sale, fair value	572	5,034
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale, amortized cost	55,036	85,992
Securities available for sale, unrealized gains	631	886
Securities available for sale, unrealized losses	0	0
Securities available for sale, fair value	55,667	86,878
Mortgage-backed Agency Securities [Member]
Securities available for sale, amortized cost	33,776	77,448
Securities available for sale, unrealized gains	999	380
Securities available for sale, unrealized losses	(42)	(166)
Securities available for sale, fair value	$ 34,733	$ 77,662
[1] Derived from audited financial statements

X

- Definition

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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