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Note 2 - Securities - Summary of Amortized Costs and Fair Values of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Amortized cost, available for sale securities	$ 125,097	$ 120,068
Gross unrealized gains, available for sale securities	3,607	1,254
Gross unrealized losses, available for sale securities	(44)	(339)
Fair value, available for sale securities	128,660	120,983
Amortized cost, held to maturity securities	17,086	17,627
Gross unrealized gains, held to maturity securities	540	99
Gross unrealized losses, held to maturity securities		(80)
Debt Securities, Held-to-maturity, Fair Value, Total	17,626	17,646
Amortized cost, total securities	142,183	137,695
Gross unrealized gains, total securities	4,147	1,353
Gross unrealized losses, total securities	(44)	(419)
Total securities	146,286	138,629
US Agency and Mortgage-backed Securities [Member]
Amortized cost, available for sale securities	99,536	94,461
Gross unrealized gains, available for sale securities	3,093	778
Gross unrealized losses, available for sale securities	(32)	(334)
Fair value, available for sale securities	102,597	94,905
Amortized cost, held to maturity securities	11,992	12,528
Gross unrealized gains, held to maturity securities	315	6
Gross unrealized losses, held to maturity securities		(80)
Debt Securities, Held-to-maturity, Fair Value, Total	12,307	12,454
Municipal Bonds [Member]
Amortized cost, available for sale securities	25,561	25,607
Gross unrealized gains, available for sale securities	514	476
Gross unrealized losses, available for sale securities	(12)	(5)
Fair value, available for sale securities	26,063	26,078
Amortized cost, held to maturity securities	3,594	3,599
Gross unrealized gains, held to maturity securities	71	81
Gross unrealized losses, held to maturity securities
Debt Securities, Held-to-maturity, Fair Value, Total	3,665	3,680
Corporate Debt Securities [Member]
Amortized cost, held to maturity securities	1,500	1,500
Gross unrealized gains, held to maturity securities	154	12
Gross unrealized losses, held to maturity securities
Debt Securities, Held-to-maturity, Fair Value, Total	$ 1,654	$ 1,512

X

- Definition

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

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