Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified													3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Developed technology [Member]	Dec. 31, 2012 Developed technology [Member]	Mar. 31, 2013 Customer relationships [Member]	Dec. 31, 2012 Customer relationships [Member]	Mar. 31, 2013 Trademarks [Member]	Dec. 31, 2012 Trademarks [Member]	Mar. 31, 2013 Non-competition agreement [Member]	Dec. 31, 2012 Non-competition agreement [Member]	Mar. 31, 2013 In-process research and development [Member]	Dec. 31, 2012 In-process research and development [Member]	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Maximum [Member]
Schedule of goodwill and intangible assets
Finite-Lived Intangible Assets, Gross	$ 10,150	$ 8,730	$ 5,820	$ 4,400	$ 3,000	$ 3,000	$ 510	$ 510	$ 410	$ 410	$ 410	$ 410
Accumulated Amortization	(1,138)	(824)	(480)	(330)	(300)	(225)	(153)	(115)	(205)	(154)	0	0
Net Carrying Amount	$ 9,012	$ 7,906	$ 5,340	$ 4,070	$ 2,700	$ 2,775	$ 357	$ 395	$ 205	$ 256	$ 410	$ 410
Estimated useful life													2 years	10 years