Goodwill and Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Intangible Assets [Abstract]

Schedule of Goodwill [Table Text Block]

Goodwill

The changes in the carrying amount of goodwill are as follows:

Balance at December 31, 2011	$	4,492
NanoPhotonics acquisition	4,154
Azores acquisition	2,725
Balance at December 31, 2012	$	11,371

Schedule of Finite-Lived Intangible Assets [Table Text Block]

Purchased intangible assets as of December 31, 2011 and 2012 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
December 31, 2011
Developed technology	$	53,826	$	47,879	$	5,947
Customer and distributor relationships	7,446		6,905		541
Trade names	4,361		3,035		1,326
Total identifiable intangible assets	$	65,633	$	57,819	$	7,814
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