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Investments in Privately-held Companies (Tables)
 3 Months Ended
Mar. 31, 2015
Investments in Privately-held Companies [Abstract]  
Investments
Our investments are summarized below (in thousands):
 
  
InvestmentBalanceasof
    
Company
 
March31,
2015
  
December31,
2014
 
Accounting
Method
 
Ownership
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.
 
$
1,682
  
$
1,723
 
Equity
  
46
%
Xilingol Tongli Germanium Co. Ltd.
  
5,440
   
5,351
 
Equity
  
25
%
Emeishan Jia Mei High Purity Metals Co., Ltd.
  
1,025
   
1,021
 
Equity
  
25
%
  
$
8,147
  
$
8,095
      
 
Summarized income information
The minority investment entities that are not consolidated are accounted for under the equity method and had the following summarized income information (in thousands) for the three months ended March 31, 2015 and 2014.

  
ThreeMonthsEnded
March31,
 
  
2015
  
2014
 
    
Revenue
 
$
9,325
  
$
13,480
 
Gross profit
  
2,295
   
3,963
 
Operating income
  
1,051
   
2,664
 
Net income
  
957
   
2,119