Annual report pursuant to Section 13 and 15(d)

Intangible Assets, Net And Goodwill (Narrative) (Details)

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Intangible Assets, Net And Goodwill (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Finite-Lived Intangible Assets [Line Items]        
Amortization expense   $ 1,403,000 $ 553,000 $ 109,000
Estimated amortization expense, 2012 1,402,000      
Estimated amortization expense, 2013 1,330,000      
Estimated amortization expense, 2014 1,330,000      
Estimated amortization expense, 2015 1,330,000      
Estimated amortization expense, 2016 $ 1,330,000      
Patents And Purchased Technology [Member]
        
Finite-Lived Intangible Assets [Line Items]        
Amortization period, in years 10