Note 7 - Segment, Significant Customers and Geographic Information - Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue	$ 293,317	$ 186,209	$ 547,772	$ 351,987
CHINA
Revenue	170,893	112,756	324,276	218,493
TAIWAN, PROVINCE OF CHINA
Revenue	48,262	22,322	78,708	38,862
Europe [Member]
Revenue	20,790	13,443	41,170	26,515
KOREA, REPUBLIC OF
Revenue	18,992	12,573	38,279	23,517
South East Asia [Member]
Revenue	12,188	11,622	23,686	20,402
JAPAN
Revenue	14,552	8,756	26,602	15,646
UNITED STATES
Revenue	7,542	4,681	14,844	8,418
Other Region [Member]
Revenue	$ 98	$ 56	$ 207	$ 134