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Note 2 - Securities - Summary of Amortized Costs and Fair Values of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortized cost, available for sale securities	$ 120,068	$ 102,147
Gross unrealized gains, available for sale securities	1,254	75
Gross unrealized losses, available for sale securities	(339)	(2,365)
Debt Securities, Available-for-sale, Total	120,983	99,857
Amortized cost, held to maturity securities	17,627	43,408
Gross unrealized gains, held to maturity securities	99	29
Gross unrealized losses, held to maturity securities	(80)	(1,043)
Debt Securities, Held-to-maturity, Fair Value, Total	17,646	42,394
Amortized cost, total securities	137,695	145,555
Gross unrealized gains, total securities	1,353	104
Gross unrealized losses, total securities	(419)	(3,408)
Total securities	138,629	142,251
US Agency and Mortgage-backed Securities [Member]
Amortized cost, available for sale securities	94,461	86,944
Gross unrealized gains, available for sale securities	778	44
Gross unrealized losses, available for sale securities	(334)	(2,066)
Debt Securities, Available-for-sale, Total	94,905	84,922
Amortized cost, held to maturity securities	12,528	27,420
Gross unrealized gains, held to maturity securities	6
Gross unrealized losses, held to maturity securities	(80)	(869)
Debt Securities, Held-to-maturity, Fair Value, Total	12,454	26,551
Municipal Bonds [Member]
Amortized cost, available for sale securities	25,607	15,203
Gross unrealized gains, available for sale securities	476	31
Gross unrealized losses, available for sale securities	(5)	(299)
Debt Securities, Available-for-sale, Total	26,078	14,935
Amortized cost, held to maturity securities	3,599	14,488
Gross unrealized gains, held to maturity securities	81	20
Gross unrealized losses, held to maturity securities		(174)
Debt Securities, Held-to-maturity, Fair Value, Total	3,680	14,334
Corporate Debt Securities [Member]
Amortized cost, held to maturity securities	1,500	1,500
Gross unrealized gains, held to maturity securities	12	9
Gross unrealized losses, held to maturity securities
Debt Securities, Held-to-maturity, Fair Value, Total	$ 1,512	$ 1,509

X

- Definition

The total amount of available-for-sale and held-to-maturity debt securities measured at amortized cost.

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The amount of accumulated unrecognized gain on investment in available-for-sale and held-to-maturity debt securities measured at amortized cost.

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The amount of accumulated unrecognized loss on investment in available-for-sale and held-to-maturity debt securities measured at amortized cost.

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Amount of debt and equity financial instruments classified as either held-to-maturity or available-for-sale.

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Amount, before other-than-temporary impairment (OTTI) accretion, of investment in debt securities measured at amortized cost (held-to-maturity).

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