Note 5 - Acquisition (Tables)
12 Months Ended
Dec. 31, 2014
Business Combinations [Abstract]  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Indefinite-lived intangible assets

  $ 19,738  

Goodwill

    14,542  

Net tangible assets

    (139 )

Deferred tax liabilities

    (6,908 )

Total purchase price allocation

  $ 27,233  
Schedule of Goodwill [Table Text Block]

Balance as of December 31, 2013

  $ 2,117  

Goodwill recorded in connection with the acquisition of Alpine

    14,542  

Balance as of December 31, 2014

  $ 16,659  
Business Acquisition, Pro Forma Information [Table Text Block]
   

Year Ended December 31,

 
   

2014

   

2013

 

Net loss

  $ (51,297 )   $ (39,287 )

Net loss per share – basic and diluted

  $ (0.66 )   $ (0.63 )