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Investments in Companies (Tables)
 6 Months Ended
Jun. 30, 2014
Investments in Companies [Abstract]  
Investments
The investments are summarized below (in thousands):
 
 
 
Investment Balance as of
 
 
 
 
 
 
June 31,
  
December 31,
 
Accounting
 
Ownership
 
Company
 
2014
  
2013
 
Method
 
Percentage
 
Beijing JiYa Semiconductor Material Co., Ltd.
 
$
3,331
  
$
3,331
 
Consolidated
  
46
%
Nanjing Jin Mei Gallium Co., Ltd.
  
592
   
592
 
Consolidated
  
83
%
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd.
  
1,346
   
1,346
 
Consolidated
  
70
%
 
 
$
5,269
  
$
5,269
 
 
    
 
        
 
    
Donghai County Dongfang High Purity Electronic Materials Co., Ltd.
 
$
1,833
  
$
1,900
 
Equity
  
46
%
Xilingol Tongli Germanium Co. Ltd.
  
5,216
   
4,692
 
Equity
  
25
%
Emeishan Jia Mei High Purity Metals Co., Ltd.
  
936
   
945
 
Equity
  
25
%
 
 
$
7,985
  
$
7,537
 
 
    
Summarized income information
All of the minority investment entities that are not consolidated and accounted for under the equity method had the following summarized income information (in thousands) for the three and six months ended June 30, 2014 and 2013.

 
 
Three Months Ended
June 30,
  
Six Months Ended
June 30,
 
 
 
2014
  
2013
  
2014
  
2013
 
 
 
  
  
  
 
Net revenue
 
$
13,466
  
$
9,641
  
$
26,946
  
$
18,914
 
Gross profit
  
8,124
   
3,764
   
12,087
   
6,888
 
Operating income
  
3,424
   
2,559
   
6,088
   
4,173
 
Net income
  
2,607
   
2,034
   
4,726
   
3,329