Note 3 - Debt Securities - Available For Sale Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Securities available for sale, less than 12 months, fair value	$ 145,581	$ 5,476
Securities available for sale, less than 12 months, unrealized losses	(259)	(11)
Securities available for sale, 12 months or longer, fair value	82,976	94,200
Securities available for sale, 12 months or longer, unrealized losses	(10,728)	(10,383)
Securities available for sale, total fair value	228,557	99,676
Securities available for sale, total unrealized losses	(10,987)	(10,394)
US Government Agencies Debt Securities [Member]
Securities available for sale, less than 12 months, fair value	1,379
Securities available for sale, less than 12 months, unrealized losses	(17)
Securities available for sale, 12 months or longer, fair value	0
Securities available for sale, 12 months or longer, unrealized losses	0
Securities available for sale, total fair value	1,379
Securities available for sale, total unrealized losses	(17)
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale, less than 12 months, fair value	2,278	1,567
Securities available for sale, less than 12 months, unrealized losses	(3)	(3)
Securities available for sale, 12 months or longer, fair value	2,103	4,689
Securities available for sale, 12 months or longer, unrealized losses	(12)	(24)
Securities available for sale, total fair value	4,381	6,256
Securities available for sale, total unrealized losses	(15)	(27)
US Treasury Securities [Member]
Securities available for sale, less than 12 months, fair value	124,750
Securities available for sale, less than 12 months, unrealized losses	(1)
Securities available for sale, 12 months or longer, fair value	0
Securities available for sale, 12 months or longer, unrealized losses	0
Securities available for sale, total fair value	124,750
Securities available for sale, total unrealized losses	(1)
Corporate 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	19,673	24,560
Securities available for sale, 12 months or longer, unrealized losses	(253)	(330)
Securities available for sale, total fair value	19,673	24,560
Securities available for sale, total unrealized losses	(253)	(330)
Mortgage-backed Agency Securities [Member]
Securities available for sale, less than 12 months, fair value	17,174	3,909
Securities available for sale, less than 12 months, unrealized losses	(238)	(8)
Securities available for sale, 12 months or longer, fair value	61,200	64,951
Securities available for sale, 12 months or longer, unrealized losses	(10,463)	(10,029)
Securities available for sale, total fair value	78,374	68,860
Securities available for sale, total unrealized losses	$ (10,701)	$ (10,037)

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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