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Segment and Geographic Information (Tables)
 12 Months Ended
Dec. 31, 2015
Segment Reporting [Abstract]  
Summary of Revenue by Geographic Area on the Customers Location

The following table sets forth revenue by geographic area on the customers’ location (in thousands):

 

 

 

Year ended December 31,

 

 

 

2015

 

2014

 

2013

 

United States

 

$

5,332

 

$

6,399

 

$

3,159

 

Korea

 

 

4,988

 

 

—

 

 

—

 

Rest of world

 

 

70

 

 

—

 

 

—

 

Total revenue

 

$

10,390

 

$

6,399

 

$

3,159