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Basis of Presentation (Details) (USD $)
Sep. 29, 2012
Sep. 28, 2012
Dec. 31, 2011
Oct. 01, 2011
Jan. 01, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]          
Cash and Cash Equivalents, at Carrying Value $ 68,283,000   $ 43,966,000 $ 44,104,000 $ 22,019,000
Purchase Agreement Price   $ 4,500,000