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Note 2 - Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Due within one year, amortized cost, available for sale securities	$ 2,034
Due within one year, fair value, available for sale securities	2,042
Due within one year, amortized cost, held to maturity securities	437
Due within one year, fair value, held to maturity securities	437
Due after one year through five years, amortized cost, available for sale securities	7,732
Due after one year through five years, fair value, available for sale securities	7,768
Due after one year through five years, amortized cost, held to maturity securities	4,741
Due after one year through five years, fair value, held to maturity securities	4,795
Due after five years through ten years, amortized cost, available for sale securities	29,875
Due after five years through ten years, fair value, available for sale securities	30,591
Due after five years through ten years, amortized cost, held to maturity securities	3,415
Due after five years through ten years, fair value, held to maturity securities	3,445
Due after ten years, amortized cost, available for sale securities	73,481
Due after ten years, fair value, available for sale securities	74,167
Due after ten years, amortized cost, held to maturity securities	9,629
Due after ten years, fair value, held to maturity securities	9,582
Amortized cost, available for sale securities	113,122	$ 102,147
Debt Securities, Available-for-sale, Total	114,568	99,857	[1]
Debt Securities, Held-to-maturity, Total	18,222
Debt Securities, Held-to-maturity, Fair Value, Total	$ 18,259	$ 42,394
[1] Derived from audited consolidated financial statements.

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