Note 6 - Components of Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) (Details) (Parentheticals) - AOCI Attributable to Parent [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Unrealized holding gain (loss) on available for sale securities, tax	$ (887)	$ 3,121
Reclassification adjustment for gain included in net income, taxes		$ (3)