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Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of Intangible asset activity
Net balance at December 31, 2011			$ 8,091
Additions			180
Net foreign currency translation			(24)
Amortization expense	(472)	(507)	(951)	(999)
Net balance at June 30, 2012	7,296		7,296
Capitalized Technology [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2011			6,693
Net foreign currency translation			(24)
Amortization expense			(911)
Net balance at June 30, 2012	5,758		5,758
Patents And Trademarks [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2011			1,361
Additions			180
Amortization expense			(30)
Net balance at June 30, 2012	1,511		1,511
Other [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2011			37
Amortization expense			(10)
Net balance at June 30, 2012	$ 27		$ 27

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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