Note 11 - Fair Value Accounting - Pension Assets (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair value at beginning of period	$ 1,689	$ 1,881
Return on plan assets	16	15
Company contributions and benefits paid, net	(17)	2
Effect of exchange rate changes	(45)	(98)
Fair value at end of period	$ 1,643	$ 1,800