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Note 15 - Stockholders' Equity (Details) - Summary of Option Activity (USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Summary of Option Activity [Abstract]  
Outstanding as of December 31, 2013 10,771,755
Outstanding as of December 31, 2013 $ 15.39
Outstanding as of September 30, 2014 11,511,431
Outstanding as of September 30, 2014 $ 15.14
Outstanding as of September 30, 2014 4 years 317 days
Outstanding as of September 30, 2014 $ 1,975 [1]
Exercisable as of September 30, 2014 5,732,361
Exercisable as of September 30, 2014 $ 17.27
Exercisable as of September 30, 2014 3 years 219 days
Exercisable as of September 30, 2014 $ 806 [1]
Options granted 1,661,862
Options granted $ 15.04
Options exercised (65,000)
Options exercised $ 10.79
Options cancelled (60,198)
Options cancelled $ 12.11
Options expired (796,988)
Options expired $ 18.86
[1] The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the estimated fair value of the Company's common stock for those awards that have an exercise price below the estimated fair value at September 30, 2014.