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Note 2 - Securities - Investments in an Unrealized Loss Position That Were Temporarily Impaired (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Less than 12 months, fair value, available for sale securities	$ 6,609	$ 5,750
Less than 12 months, unrealized (loss), available for sale securities	(208)	(244)
12 months or more, fair value, available for sale securities	135,181	137,254
12 months or more, unrealized (loss), available for sale securities	(22,022)	(20,418)
Total, fair value, available for sale securities	141,790	143,004
Total, unrealized (loss), available for sale securities	(22,230)	(20,662)
US Treasury Securities [Member]
Less than 12 months, fair value, available for sale securities	0	0
Less than 12 months, unrealized (loss), available for sale securities	0	0
12 months or more, fair value, available for sale securities	11,399	11,450
12 months or more, unrealized (loss), available for sale securities	(1,079)	(1,026)
Total, fair value, available for sale securities	11,399	11,450
Total, unrealized (loss), available for sale securities	(1,079)	(1,026)
US Agency and Mortgage-backed Securities [Member]
Less than 12 months, fair value, available for sale securities	1,268	1,281
Less than 12 months, unrealized (loss), available for sale securities	(13)	(29)
12 months or more, fair value, available for sale securities	75,506	78,800
12 months or more, unrealized (loss), available for sale securities	(12,984)	(12,163)
Total, fair value, available for sale securities	76,774	80,081
Total, unrealized (loss), available for sale securities	(12,997)	(12,192)
US States and Political Subdivisions Debt Securities [Member]
Less than 12 months, fair value, available for sale securities	5,341	4,469
Less than 12 months, unrealized (loss), available for sale securities	(195)	(215)
12 months or more, fair value, available for sale securities	48,276	47,004
12 months or more, unrealized (loss), available for sale securities	(7,959)	(7,229)
Total, fair value, available for sale securities	53,617	51,473
Total, unrealized (loss), available for sale securities	$ (8,154)	$ (7,444)

X

- Definition

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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