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Summary of Significant Accounting Policies (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Reconciliation of the changes in the Company's deferred revenue balance    
Balance, beginning of period $ 1,014 $ 1,002
Additions to deferral 1,131 1,403
Revenue recognized (1,141) (1,391)
Balance, end of period $ 1,004 $ 1,014