Note 20 - Fair Value Measurements and Fair Value of Financial Instruments - Assets Measured on Recurring Basis Using Significant Unobservable Inputs (Details) - US States and Political Subdivisions Debt Securities [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Beginning	$ 7,349	$ 8,565
Principal paydowns	(272)	(287)
Changes in unrealized gain (loss)	45	(929)
Beginning	$ 7,122	$ 7,349