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Summary of Significant Accounting Policies (Details 1) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Reconciliation of the changes in the Company's deferred revenue balance    
Balance, beginning of period $ 1,004 [1] $ 1,014
Additions to deferral 985 680
Revenue recognized (927) (833)
Balance, end of period $ 1,062 $ 861
[1] Derived from the audited consolidated financial statements included in the annual report filed on Form 10-K with the SEC for the year ended December 29, 2012.