Note 17 - Supplementary Financial Information (Unaudited) (Details) - Quarterly Results of Operations (USD $)
In Thousands, except Per 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
Quarterly Results of Operations [Abstract]                      
Total revenue $ 54,753 [1] $ 36,278 $ 33,922 $ 31,189 $ 29,130 $ 26,611 $ 24,339 $ 22,584 $ 156,142 $ 102,664 $ 91,206
Gross profit 20,627 [1] 23,275 21,626 20,126 19,016 16,815 15,446 14,292 85,654 65,569 58,522
Net income (loss) $ (17,390) [1] $ (6,857) $ 2,634 $ (995) $ (1,273) $ (2,760) $ (1,474) $ (7,671) $ (22,608) $ (13,178) $ (20,691)
Basic earnings per share (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 earnings per share (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.