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Segment Information and Foreign Operations
 12 Months Ended
Dec. 31, 2014
Segment Information and Foreign Operations [Abstract]  
Segment Information and Foreign Operations

Note 15. Segment Information and Foreign Operations

Segment Information

We operate in one segment for the design, development, manufacture and distribution of high-performance compound semiconductor substrates and sale of materials. In accordance with ASC topic 280, Segment Reporting, our chief operating decision-maker has been identified as the Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the Company. Since we operate in one segment, all financial segment and product line information can be found in the consolidated financial statements.

Geographical Information

The following table represents revenue amounts (in thousands) reported for products shipped to customers in the corresponding geographic region:

Years Ended December 31,
2014
2013
2012
Product revenue:
 
 
 
 
 
 
 
 
 
Europe (primarily Germany)
$
21,535
 
$
21,387
 
$
18,170
 
China
 
17,451
 
 
24,946
 
 
19,815
 
North America (primarily the United States)
 
10,292
 
 
10,665
 
 
15,391
 
Japan
 
11,550
 
 
9,041
 
 
9,346
 
Taiwan
 
11,464
 
 
10,131
 
 
10,985
 
Asia Pacific (excluding China, Japan and Taiwan)
 
11,207
 
 
9,165
 
 
14,667
 
$
83,499
 
$
85,335
 
$
88,374
 

Long-lived assets consist primarily of property, plant and equipment, and are attributed to the geographic location in which they are located. Long-lived assets by geographic region were as follows (in thousands):

As of December 31,
2014
2013
Long-lived assets:
 
 
 
 
 
 
United States of America
$
136
 
$
204
 
China
 
33,726
 
 
37,417
 
$
33,862
 
$
37,621