Note 18 - Segment Reporting - Expenditures for Additions to Long-lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Expenditures for additions to long-lived assets	$ 21,686	$ 34,209	$ 47,010
UNITED STATES
Expenditures for additions to long-lived assets	17,538	26,698	29,984
Europe [Member]
Expenditures for additions to long-lived assets	4,137	7,378	16,574
JAPAN
Expenditures for additions to long-lived assets	$ 11	$ 133	$ 452