Note 16 - Segment and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Long lived assets by region	$ 281,528	$ 228,315	$ 150,001
CHINA
Long lived assets by region	151,752	113,888	93,096
UNITED STATES
Long lived assets by region	101,768	94,671	39,054
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	18,797	17,652	16,972
Other Region [Member]
Long lived assets by region	$ 9,211	$ 2,104	$ 879