Note 14 - Segment and Geographic Information (Details) - Revenue by Geographic Region (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	$ 54,753	[1]	$ 36,278	$ 33,922	$ 31,189	$ 29,130	$ 26,611	$ 24,339	$ 22,584	$ 156,142	$ 102,664	$ 91,206
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region										54,312	23,039	20,724
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region										22,918	22,389	21,582
KOREA, REPUBLIC OF
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region										10,123	21,818	17,424
Other Country [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region										$ 68,789	$ 35,418	$ 31,476

[1] On October 3, 2014, we completed the acquisition of Cortina, including its high-speed interconnect and optical transport product lines. The results of operations of Cortina and estimated fair value of assets acquired and liabilities assumed were included in our financial statements from the acquisition date. This acquisition resulted in a significant change in our statement of operations in 2014 which includes increase cost of goods sold resulting from the step-up inventory acquired from Cortina and amortization of acquired intangibles.