Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations [Line Items]
Revenue distribution	$ 143,036	$ 151,063	$ 162,790
HONG KONG
Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations [Line Items]
Revenue distribution	79,622	86,090	84,737
JAPAN
Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations [Line Items]
Revenue distribution	31,261	34,377	51,033
Europe [Member]
Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations [Line Items]
Revenue distribution	6,787	7,370	7,429
UNITED STATES
Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations [Line Items]
Revenue distribution	4,702	4,342	2,028
CHINA
Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations [Line Items]
Revenue distribution	6,568	6,999	6,270
TAIWAN, PROVINCE OF CHINA
Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations [Line Items]
Revenue distribution	9,077	7,093	6,496
Other Geographic Regions [Member]
Note 18 - Segment Information (Details) - Summary of Operations Within Geographic Areas Based On Customer Locations [Line Items]
Revenue distribution	$ 5,019	$ 4,792	$ 4,797