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Balance Sheet Details - Other Current Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Jun. 30, 2013
Dec. 31, 2012
Other Current Liabilities [Abstract]      
Estimated Litigation Liability, Current   $ 4,293 $ 4,293
Deferred Revenue   8,010 11,170
Other Current Liabilities Subtotal   4,801 5,889
Other Liabilities, Current $ 17,104 $ 17,104 $ 21,352