Note 7 - Segment and Geographic Information (Details) - Revenue By Region (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	$ 78,335	$ 65,347	$ 206,832	$ 174,531
CHINA
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	51,796	40,577	132,585	102,099
TAIWAN, PROVINCE OF CHINA
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	9,379	8,886	28,080	24,726
Europe [Member]
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	5,212	3,949	14,377	11,226
KOREA, REPUBLIC OF
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	4,067	2,599	10,693	7,425
UNITED STATES
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	4,079	1,812	9,913	5,552
JAPAN
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	2,221	2,285	6,075	5,446
South East Asia [Member]
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	1,534	5,103	4,955	17,817
Other Region [Member]
Note 7 - Segment and Geographic Information (Details) - Revenue By Region [Line Items]
Revenue By Region	$ 47	$ 136	$ 154	$ 240