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Identifiable Intangible Assets and Goodwill
3 Months Ended
Mar. 31, 2013
Identifiable Intangible Assets and Goodwill [Abstract]  
Intangible Assets Disclosure [Text Block]
Goodwill and Purchased Intangible Assets
Goodwill
The changes in the carrying amount of goodwill are as follows:
Balance at December 31, 2012
 
$
11,371

NanoPhotonics GmbH acquisition
 
(125
)
Azores acquisition
 
6

Balance at March 31, 2013
 
$
11,252



Purchased Intangible Assets
Purchased intangible assets as of  March 31, 2013 and December 31, 2012 are as follows:


Gross Carrying Amount

Accumulated Amortization

Net
March 31, 2013







 

Developed technology

$
58,916


$
49,889


$
9,027

Customer and distributor relationships

8,678


7,167


1,511

Trade names

4,361


3,228


1,133

Total identifiable intangible assets

$
71,955


$
60,284


$
11,671

December 31, 2012

 


 


 

Developed technology

$
58,961


$
49,358


$
9,603

Customer and distributor relationships

8,712


7,102


1,610

Trade names

4,361


3,216


1,145

Total identifiable intangible assets

$
72,034


$
59,676


$
12,358


Intangible asset amortization expense for the three months ended March 31, 2013 and 2012 was $616 and $416, respectively. Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, estimated amortization expense for the remainder of 2013 will be $1,839, and for each of the next five years estimated amortization expense amounts to $2,196 for 2014, $1,824 for 2015, $1,715 for 2016, $1,327 for 2017, and $891 for 2018.