Note 5 - Amounts Reclassified Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reclassification Adjustment Out Of Accumulated Other Comprehensive Loss [Line Items]
Income before income taxes	$ 3,009	$ 2,212	$ 6,266	$ 7,453
Tax effect	(544)	(325)	(1,207)	(1,448)
Net income	2,465	1,887	5,059	6,005
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	(1,096)		(1,096)	(257)
Interest and dividends on available-for-sale & equity securities	52	(38)	(22)	(38)
Income before income taxes	(1,044)	(38)	(1,118)	(295)
Tax effect	218	8	235	62
Net income	$ (826)	$ (30)	$ (883)	$ (233)