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Cash, Cash Equivalents and Investments - Cash and Cash Equivalents (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Cash And Cash Equivalents [Abstract]        
Cash $ 13,805 $ 15,064    
Money market funds 1,607 33,345    
Total cash and cash equivalents $ 15,412 $ 48,409 $ 25,786 $ 32,584