Note 14 - Segment and Geographic Information
 12 Months Ended
Dec. 31, 2014
Segment Reporting [Abstract]  
Segment Reporting Disclosure [Text Block]

14. Segment and Geographic Information


The Company operates in one reportable segment. Revenue by region is classified based on the locations to which the product is transported, which may differ from the customer’s principal offices.


The following table sets forth the Company’s revenue by geographic region:


   

Year Ended December 31,

 
   

2014

   

2013

   

2012

 

China

  $ 54,312     $ 23,039     $ 20,724  

United States

    22,918       22,389       21,582  

Korea

    10,123       21,818       17,424  

Other

    68,789       35,418       31,476  
    $ 156,142     $ 102,664     $ 91,206  

As of December 31, 2014, $6,153 of long-lived tangible assets are located outside the United States of which $3,463 are located in Taiwan. As of December 31, 2013, $5,217 of long-lived tangible assets are located outside the United States of which $4,694 are located in Taiwan.