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Supplemental Financial Information (Schedule Of Warranty Liability Activity, II) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 29, 2013
Dec. 29, 2012
Jun. 30, 2012
Dec. 31, 2011
Supplemental Financial Information [Abstract]        
Warranty liabilities $ 259 $ 235 $ 221 $ 189
Less current portion (154)   (133)  
Long-term warranty obligations $ 105   $ 88