Note 3 - Investment Securities - Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Securities available for sale, amortized cost	$ 251,819	$ 266,437
Securities available for sale, gross unrealized gains	3,644	862
Securities available for sale, gross unrealized losses	901	5,458
Securities available for sale, fair value	254,562	261,841
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities available for sale, amortized cost	69,984	94,746
Securities available for sale, gross unrealized gains	90
Securities available for sale, gross unrealized losses	576	3,489
Securities available for sale, fair value	69,498	91,257
Agency Collateralized Mortgage Obligations [Member]
Securities available for sale, amortized cost	43,067	33,222
Securities available for sale, gross unrealized gains	238	152
Securities available for sale, gross unrealized losses	221	382
Securities available for sale, fair value	43,084	32,992
US Government Agencies Debt Securities [Member]
Securities available for sale, amortized cost	64,162	75,461
Securities available for sale, gross unrealized gains	473	59
Securities available for sale, gross unrealized losses	79	1,016
Securities available for sale, fair value	64,556	74,504
Municipal Notes [Member]
Securities available for sale, amortized cost	74,606	63,008
Securities available for sale, gross unrealized gains	2,843	651
Securities available for sale, gross unrealized losses	25	571
Securities available for sale, fair value	$ 77,424	$ 63,088

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

No definition available.

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- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563

+ Details

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

+ Details

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

+ Details

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