Note 3 - Securities - Summary of Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt securities, amortized cost	$ 89,379	$ 120,245
Debt securities, gross unrealized gains	2,364	686
Debt securities, gross unrealized losses	(356)	(824)
Debt securities, fair value	91,387	120,107
US Government-sponsored Enterprises Debt Securities [Member]
Debt securities, amortized cost	1,000	7,069
Debt securities, gross unrealized gains	22	14
Debt securities, gross unrealized losses		(6)
Debt securities, fair value	1,022	7,077
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt securities, amortized cost	18,614	40,868
Debt securities, gross unrealized gains	556	291
Debt securities, gross unrealized losses	(25)	(84)
Debt securities, fair value	19,145	41,075
Collateralized Mortgage Obligations [Member]
Debt securities, amortized cost	20,278	33,001
Debt securities, gross unrealized gains	372	71
Debt securities, gross unrealized losses	(19)	(235)
Debt securities, fair value	20,631	32,837
US States and Political Subdivisions Debt Securities [Member]
Debt securities, amortized cost	37,046	27,848
Debt securities, gross unrealized gains	1,071	217
Debt securities, gross unrealized losses	(55)	(269)
Debt securities, fair value	38,062	27,796
Corporate Debt Securities [Member]
Debt securities, amortized cost	12,441	11,459
Debt securities, gross unrealized gains	343	93
Debt securities, gross unrealized losses	(257)	(230)
Debt securities, fair value	$ 12,527	$ 11,322

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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