Goodwill and Intangible Assets, Net (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Intangible assets
Balance at the beginning of the period	$ 2,485	$ 2,805	$ 3,125
Amortization	(320)	(320)	(320)
Balance at the end of the period	2,165	2,485	2,805
Amortization period of core technology acquired from Hermes	10 years
IPR & D
In-process research and development	7,010	7,010	7,010	7,010
Goodwill
Goodwill	3,605	3,605	3,605	3,605
Expected amortization expenses for the next five-year period:
2013	320
2014	320
2015	320
2016	320
2017	$ 320