Note 3 - Debt Securities - Available For Sale Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Securities available for sale, less than 12 months, fair value	$ 11,018	$ 8,995
Securities available for sale, less than 12 months, unrealized losses	(97)	(52)
Securities available for sale, 12 months or longer, fair value	544	8,319
Securities available for sale, 12 months or longer, unrealized losses	(4)	(118)
Securities available for sale, total fair value	11,562	17,314
Securities available for sale, total unrealized losses	(101)	(170)
US Government Agencies Debt Securities [Member]
Securities available for sale, less than 12 months, fair value	0	975
Securities available for sale, less than 12 months, unrealized losses	0	(4)
Securities available for sale, 12 months or longer, fair value	544	0
Securities available for sale, 12 months or longer, unrealized losses	(4)	0
Securities available for sale, total fair value	544	975
Securities available for sale, total unrealized losses	(4)	(4)
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale, less than 12 months, fair value	0	0
Securities available for sale, less than 12 months, unrealized losses	0	0
Securities available for sale, 12 months or longer, fair value	0	0
Securities available for sale, 12 months or longer, unrealized losses	0	0
Securities available for sale, total fair value	0	0
Securities available for sale, total unrealized losses	0	0
Mortgage-backed Agency Securities [Member]
Securities available for sale, less than 12 months, fair value	11,018	8,020
Securities available for sale, less than 12 months, unrealized losses	(97)	(48)
Securities available for sale, 12 months or longer, fair value	0	8,319
Securities available for sale, 12 months or longer, unrealized losses	0	(118)
Securities available for sale, total fair value	11,018	16,339
Securities available for sale, total unrealized losses	$ (97)	$ (166)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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-Name Accounting Standards Codification
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