Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of Intangible asset activity
Net balance at December 31, 2011			$ 8,091
Additions			257
Net foreign currency translation			(17)
Amortization expense	(476)	(486)	(1,427)	(1,485)
Net balance at September 30, 2012	6,904		6,904
Capitalized Technology [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2011			6,693
Additions			0
Net foreign currency translation			(17)
Amortization expense			(1,372)
Net balance at September 30, 2012	5,304		5,304
Patents And Trademarks [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2011			1,361
Additions			257
Net foreign currency translation			0
Amortization expense			(41)
Net balance at September 30, 2012	1,577		1,577
Other [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2011			37
Additions			0
Net foreign currency translation			0
Amortization expense			(14)
Net balance at September 30, 2012	$ 23		$ 23