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Note 3 - Securities - Securities With Unrealized Losses (Details) $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Count, less than 12 months	10	2
Fair value, less than 12 months	$ 79,872	$ 8,987
Unrealized loss, less than 12 months	$ (128)	$ (13)
Count, 12 months or more	85	198
Fair value, 12 months or more	$ 50,823	$ 134,306
Unrealized loss, 12 months or more	$ (770)	$ (3,580)
Count, total	95	200
Fair value, total	$ 130,695	$ 143,293
Unrealized loss, total	$ (898)	$ (3,593)
US Treasury Securities [Member]
Count, less than 12 months	0	0
Fair value, less than 12 months	$ 0	$ 0
Unrealized loss, less than 12 months	$ 0	$ 0
Count, 12 months or more	73	170
Fair value, 12 months or more	$ 48,609	$ 112,508
Unrealized loss, 12 months or more	$ (689)	$ (3,412)
Count, total	73	170
Fair value, total	$ 48,609	$ 112,508
Unrealized loss, total	$ (689)	$ (3,412)
US Government-sponsored Enterprises Debt Securities [Member]
Count, less than 12 months	10	2
Fair value, less than 12 months	$ 79,872	$ 8,987
Unrealized loss, less than 12 months	$ (128)	$ (13)
Count, 12 months or more	0	4
Fair value, 12 months or more	$ 0	$ 17,951
Unrealized loss, 12 months or more	$ 0	$ (49)
Count, total	10	6
Fair value, total	$ 79,872	$ 26,938
Unrealized loss, total	$ (128)	$ (62)
Residential Mortgage-Backed Securities [Member]
Count, less than 12 months	0	0
Fair value, less than 12 months	$ 0	$ 0
Unrealized loss, less than 12 months	$ 0	$ 0
Count, 12 months or more	7	17
Fair value, 12 months or more	$ 1,364	$ 2,627
Unrealized loss, 12 months or more	$ (69)	$ (91)
Count, total	7	17
Fair value, total	$ 1,364	$ 2,627
Unrealized loss, total	$ (69)	$ (91)
Collateralized Mortgage-Backed Securities [Member]
Count, less than 12 months	0	0
Fair value, less than 12 months	$ 0	$ 0
Unrealized loss, less than 12 months	$ 0	$ 0
Count, 12 months or more	5	6
Fair value, 12 months or more	$ 850	$ 1,003
Unrealized loss, 12 months or more	$ (12)	$ (20)
Count, total	5	6
Fair value, total	$ 850	$ 1,003
Unrealized loss, total	$ (12)	$ (20)
US States and Political Subdivisions Debt Securities [Member]
Count, less than 12 months		0
Fair value, less than 12 months		$ 0
Unrealized loss, less than 12 months		$ 0
Count, 12 months or more		1
Fair value, 12 months or more		$ 217
Unrealized loss, 12 months or more		$ (8)
Count, total		1
Fair value, total		$ 217
Unrealized loss, total		$ (8)

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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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