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Segment Information and Foreign Operations (Tables)
9 Months Ended
Sep. 30, 2013
Segment Information and Foreign Operations [Abstract]  
Product Information
The following table represents revenue amounts (in thousands) by product type:

 
 
Three Months Ended
  
Nine Months Ended
 
 
 
September 30,
  
September 30,
 
 
 
2013
  
2012
  
2013
  
2012
 
Product type:
 
  
  
  
 
GaAs substrates
 
$
9,013
  
$
12,901
  
$
31,378
  
$
39,994
 
InP substrates
  
1,420
   
1,649
   
5,286
   
4,433
 
Ge substrates
  
5,472
   
2,007
   
13,370
   
7,078
 
Raw materials and other
  
4,616
   
4,251
   
16,698
   
17,942
 
Total
 
$
20,521
  
$
20,808
  
$
66,732
  
$
69,447
 
Revenue reported for products shipped to customers in the corresponding geographic region
The following table represents revenue amounts (in thousands) reported for products shipped to customers in the corresponding geographic region:

 
 
Three Months Ended
  
Nine Months Ended
 
 
 
September 30,
  
September 30
 
 
 
2013
  
2012
  
2013
  
2012
 
Geographical region:
 
  
  
  
 
China
 
$
6,611
  
$
3,063
  
$
20,344
  
$
15,031
 
Europe (primarily Germany)
  
5,732
   
5,148
   
16,043
   
14,519
 
Taiwan
  
1,536
   
3,490
   
8,474
   
9,130
 
North America (primarily the United States)
  
2,298
   
3,230
   
7,810
   
12,663
 
Japan
  
1,931
   
2,404
   
7,233
   
7,196
 
Asia Pacific (excluding China, Taiwan and Japan)
  
2,413
   
3,473
   
6,828
   
10,908
 
Total
 
$
20,521
  
$
20,808
  
$
66,732
  
$
69,447
 
Long-lived assets by geographic region
 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
 
 
 
September 30,
  
December 31,
 
 
 
2013
  
2012
 
 
 
  
 
North America
 
$
228
  
$
430
 
China
  
37,222
   
36,805
 
 
 
$
37,450
  
$
37,235