Note 5 - Amounts Reclassified Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reclassification Adjustment Out Of Accumulated Other Comprehensive Loss [Line Items]
Income before income taxes	$ 3,257	$ 5,241
Tax effect	(663)	(1,123)
Net income	2,594	4,118
Reclassification out of Accumulated Other Comprehensive Loss
Reclassification Adjustment Out Of Accumulated Other Comprehensive Loss [Line Items]
Unrealized net holding losses on available-for-sale securities		(257)
Fair value remeasurements on fair value hedges	(74)
Income before income taxes	(74)	(257)
Tax effect	16	54
Net income	$ (58)	$ (203)