Note 15 - Fair Values Of Financial Instruments - Changes in Level 3 Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Balance at the beginning of the period	$ 2,006	$ 4,022
Included in other comprehensive income	21	234
Transfers in and/or out of Level 3	1,558	(2,250)
Balance at the end of the period	$ 3,585	$ 2,006