Note 7 - Segment, Significant Customers and Geographic Information - Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue	$ 254,455	$ 165,778
CHINA
Revenue	153,383	105,737
TAIWAN, PROVINCE OF CHINA
Revenue	30,445	16,540
Europe [Member]
Revenue	20,380	13,072
KOREA, REPUBLIC OF
Revenue	19,287	10,944
South East Asia [Member]
Revenue	11,497	8,780
JAPAN
Revenue	12,049	6,890
UNITED STATES
Revenue	7,302	3,737
Other Region [Member]
Revenue	$ 112	$ 78