Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of Intangible asset activity
Net balance at December 31, 2012	$ 6,507
Additions-Other	81
Net foreign currency translation
Amortization expense	(441)	(479)
Net balance at March 31, 2013	6,147
Capitalized Technology [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2012	4,847
Additions-Other
Net foreign currency translation	1
Amortization expense	(419)
Net balance at March 31, 2013	4,429
Patents And Trademarks [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2012	1,642
Additions-Other	81
Net foreign currency translation	(1)
Amortization expense	(17)
Net balance at March 31, 2013	1,705
Other [Member]
Schedule of Intangible asset activity
Net balance at December 31, 2012	18
Additions-Other
Net foreign currency translation
Amortization expense	(5)
Net balance at March 31, 2013	$ 13