Note 7 - Goodwill and Identifiable Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
   

December 31, 2014

 
   

Gross

   

Accumulated

Amortization

   

Net

 

Developed technology

  $ 71,570     $ 2,857     $ 68,713  

Customer relationships

    8,170       201       7,969  

Trade name

    920       46       874  

Patents

    1,579       112       1,467  

In-process research and development

    1,750       —       1,750  
    $ 83,989     $ 3,216     $ 80,773  
Finite-lived Intangible Assets Amortization Expense [Table Text Block]

Cost of goods sold

  $ 2,857  

Sales and marketing

    201  

General and administrative

    158  
    $ 3,216  
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

2015

  $ 12,730  

2016

    12,704  

2017

    12,678  

2018

    12,645  

2019

    11,075  

Thereafter

    17,191  
    $ 79,023  
Finite-Lived Intangible Assets, Remaining Amortization Period [Table Text Block]

Developed technology

    6.27  

Customer relationship

    9.75  

Others

    10.71