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Note 2 - Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Due within one year, amortized cost, available for sale securities	$ 1,409
Due within one year, fair value, available for sale securities	1,416
Due within one year, amortized cost, held to maturity securities	392
Due within one year, fair value, held to maturity securities	397
Due after one year through five years, amortized cost, available for sale securities	13,424
Due after one year through five years, fair value, available for sale securities	13,984
Due after one year through five years, amortized cost, held to maturity securities	4,547
Due after one year through five years, fair value, held to maturity securities	4,710
Due after five years through ten years, amortized cost, available for sale securities	31,236
Due after five years through ten years, fair value, available for sale securities	32,563
Due after five years through ten years, amortized cost, held to maturity securities	3,973
Due after five years through ten years, fair value, held to maturity securities	4,148
Due after ten years, amortized cost, available for sale securities	66,854
Due after ten years, fair value, available for sale securities	69,169
Due after ten years, amortized cost, held to maturity securities	6,189
Due after ten years, fair value, held to maturity securities	6,383
Amortized cost, available for sale securities	112,923	$ 120,068
Fair value, available for sale securities	117,132	120,983	[1]
Amortized cost, held to maturity securities	15,101
Securities, fair value	$ 15,638	$ 17,646	[1]
[1] Derived from audited consolidated financial statements.

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