Note 10 - Earnings Per Share (Details) - Computation of Basic and Diluted Earnings Per Share (USD $)
In Thousands, except Share data, 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
Numerator                      
Net loss (in Dollars) $ (17,390) [1] $ (6,857) $ 2,634 $ (995) $ (1,273) $ (2,760) $ (1,474) $ (7,671) $ (22,608) $ (13,178) $ (20,691)
Denominator                      
Weighted average common stock                 32,707,868 29,495,856 28,391,528
Less weighted average unvested common stock subject to repurchase and unvested restricted stock award                   (2,851) (12,848)
Weighted average common stock—basic and diluted                 32,707,868 29,493,005 28,378,680
Earnings per share                      
Basic (in Dollars per share) $ (0.47) [1] $ (0.22) $ 0.08 $ (0.03) $ (0.04) $ (0.09) $ (0.05) $ (0.27) $ (0.69) $ (0.45) $ (0.73)
Diluted (in Dollars per share) $ (0.47) [1] $ (0.22) $ 0.08 $ (0.03) $ (0.04) $ (0.09) $ (0.05) $ (0.27) $ (0.69) $ (0.45) $ (0.73)
[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.