Note 7 - Segment, Significant Customers and Geographic Information - Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue	$ 323,522	$ 259,422	$ 871,294	$ 611,409
CHINA
Revenue	184,796	157,215	509,072	375,708
TAIWAN, PROVINCE OF CHINA
Revenue	47,048	40,782	125,756	79,644
Europe [Member]
Revenue	21,328	14,255	62,498	40,770
KOREA, REPUBLIC OF
Revenue	24,442	20,935	62,721	44,452
South East Asia [Member]
Revenue	14,820	11,854	38,506	32,256
JAPAN
Revenue	20,944	9,433	47,546	25,079
UNITED STATES
Revenue	10,091	4,880	24,935	13,298
Other Region [Member]
Revenue	$ 53	$ 68	$ 260	$ 202