Note 9 - Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025
Balance	$ 213,799	$ 212,018	$ 187,805	$ 176,332	$ 212,018	$ 176,332
Current period other comprehensive loss	(1,285)	(3,078)	2,324	8,886
Balance	217,154	213,799	194,885	187,805	217,154	194,885
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(18,847)	(15,769)	(25,271)	(34,157)	(15,769)	(34,157)
Current period other comprehensive loss	(1,285)		2,324		(4,363)	11,210
Balance	(20,132)	(18,847)	(22,947)	(25,271)	(20,132)	(22,947)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] \| Officer [Member]
Balance	221	221	207	207	221	207
Current period other comprehensive loss	0		0		0	0
Balance	221	221	207	207	221	207
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] \| Director [Member]
Balance	70	70	99	99	70	99
Current period other comprehensive loss	0		0		0	0
Balance	70	70	99	99	70	99
AOCI Attributable to Parent [Member]
Balance	(18,556)	(15,478)	(24,965)	(33,851)	(15,478)	(33,851)
Current period other comprehensive loss	(1,285)	(3,078)	2,324	8,886	(4,363)	11,210
Balance	$ (19,841)	$ (18,556)	$ (22,641)	$ (24,965)	$ (19,841)	$ (22,641)

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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+ Details