Note 13 - Segments - Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Long-lived assets	$ 69,471	$ 63,923
UNITED STATES
Long-lived assets	30,438	26,748
CHINA
Long-lived assets	29,904	28,711
SLOVAKIA
Long-lived assets	6,675	5,514
UNITED KINGDOM
Long-lived assets	1,264	1,715
All Other Foreign Countries [Member]
Long-lived assets	$ 1,190	$ 1,235