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Intangible Assets
3 Months Ended
Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible Assets
The Company’s amortizable and unamortizable intangible assets at March 31, 2013 and December 31, 2012 are as follows:
 
Cost
 
Accumulated Amortization
 
March 31,
2013
 
December 31, 2012
 
March 31,
2013
 
December 31, 2012
Amortizable intangible assets:
 
 
 
 
 
 
 
Patents
$
14

 
$
14

 
$
8

 
$
8

Licenses
47

 
47

 
18

 
17

Customer relationships
249

 
255

 
65

 
61

Technical knowledge
48

 
48

 
16

 
15

Other
29

 
29

 
22

 
22

Total amortizable intangible assets
$
387

 
$
393

 
$
129

 
$
123

Unamortizable intangible assets:
 
 
 
 
 
 
 
Goodwill
$
701

 
$
717

 
$
26

 
$
26

Trademarks and trade names
20

 
20

 
8

 
8

Total unamortizable intangible assets
$
721

 
$
737

 
$
34

 
$
34


The Company recorded amortization expense of $7 for the three months ended March 31, 2013 and 2012, respectively, related to amortizable intangible assets. Amortizable intangible assets are amortized over their estimated useful lives, which range from one to twenty years, using the straight-line method. The Company expects to record annual amortization expense for all existing intangible assets in a range from approximately $21 to $26 from 2013 through 2017.
The change in net goodwill for the three months ended March 31, 2013 is as follows:
 
 
Balance at December 31, 2012
$
691

Acquisitions
(1
)
Impact of foreign currency exchange rates
(15
)
Balance at March 31, 2013
$
675


Current period acquisition activity related to the finalization of purchase accounting for BioReliance and Research Organics, which were acquired in January 2012 and March 2012, respectively.