Note 5 - Segment Information (Details) - Revenue By Region (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	$ 68,436	$ 57,714	$ 128,497	$ 109,184
CHINA
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	43,931	34,743	80,789	61,522
TAIWAN, PROVINCE OF CHINA
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	9,638	8,321	18,701	15,840
Europe [Member]
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	4,574	3,327	9,165	7,277
KOREA, REPUBLIC OF
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	3,890	2,408	6,626	4,826
UNITED STATES
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	3,231	1,839	5,834	3,740
JAPAN
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	1,713	1,640	3,854	3,161
South East Asia [Member]
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	1,407	5,385	3,421	12,714
Other Region [Member]
Note 5 - Segment Information (Details) - Revenue By Region [Line Items]
Revenue By Region	$ 52	$ 51	$ 107	$ 104