Note 7 - Segment, Significant Customers and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Long lived assets by region	$ 340,060	$ 281,528
CHINA
Long lived assets by region	192,485	151,752
UNITED STATES
Long lived assets by region	113,310	101,768
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	19,187	18,797
Other Region [Member]
Long lived assets by region	$ 15,078	$ 9,211