Note 18 - Segment Reporting - Expenditures for Additions to Long-lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Expenditures for additions to long-lived assets	$ 34,209	$ 47,010	$ 62,230
UNITED STATES
Expenditures for additions to long-lived assets	26,698	29,984	45,123
Europe [Member]
Expenditures for additions to long-lived assets	7,378	16,574	14,743
JAPAN
Expenditures for additions to long-lived assets	$ 133	$ 452	$ 2,364