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.