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Goodwill and Intangible Assets
3 Months Ended
Mar. 31, 2014
Goodwill and Intangible Assets [Abstract]  
Goodwill and Intangible Assets
(3)Goodwill and Intangible Assets

The change in the carrying amount of goodwill for the three months ended March 31, 2014, is as follows:

Balance as of December 31, 2013
 
$
38,670
 
Translation effect
  
(7
)
Balance as of March 31, 2014
 
$
38,663
 
 

Acquired intangible assets, which are amortized, consist of the following:

 
As of March 31, 2014
 
Amortization Period
 
Gross
Carrying Amount
  
Accumulated Amortization
  
Net
Carrying Amount
 
       
Technology-based intangibles
20 years
 
$
4,192
  
$
(839
)
 
$
3,353
 
Customer-related intangibles
10 - 15 years
  
813
   
(222
)
  
591
 
 
$
5,005
  
$
(1,061
)
 
$
3,944
 

 
As of December 31, 2013
 
Amortization Period
 
Gross
Carrying Amount
  
Accumulated Amortization
  
Net
Carrying Amount
 
       
Technology-based intangibles
20 years
 
$
4,192
  
$
(786
)
 
$
3,406
 
Customer-related intangibles
10 - 15 years
  
814
   
(209
)
  
605
 
 
  
$
5,006
  
$
(995
)
 
$
4,011
 

The change in the gross carrying amount is due to the impact of foreign currency translation.

Amortization expense was $66 and $64 for the three months ended March 31, 2014 and 2013, respectively.

Amortization expense related to current intangible assets is expected to be approximately $265 for 2014 and for each of the next four years.