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Segment Information (Tables)
 12 Months Ended
Dec. 31, 2015
Segment Reporting [Abstract]  
Summary of Revenues on Percentage Basis by Geographic Regions

The following table summarizes revenues on a percentage basis by geographic regions, based on the country in which the customer is located.

 

 

 

Years ended December 31,

 

 

 

2015

 

 

2014

 

 

2013

 

United States

 

 

64

%

 

 

76

%

 

 

84

%

South America

 

 

13

%

 

 

—

 

 

 

—

 

Japan

 

 

2

%

 

 

6

%

 

 

8

%

Europe

 

 

19

%

 

 

14

%

 

 

—

 

Other

 

 

2

%

 

 

4

%

 

 

8

%

 

 

 

100

%

 

 

100

%

 

 

100

%