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Investment in RealD (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2011
Investment in Marketable Securities - Real D (Textual) [Abstract]      
Exercise price of options   $ 0.00667  
Number of options to purchase common stock 1,222,780    
Number of shares owned in RealD 1,222,780    
Estimated fair value of company owned shares in RealD $ 16,508   $ 9,709
Unrealized holding loss $ 6,799