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Supplemental Financial Information (Schedule Of Warranty Liability Activity, I) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 29, 2013
Jun. 30, 2012
Supplemental Financial Information [Abstract]    
Beginning balance $ 235 $ 189
Estimated cost of warranty claims charged to cost of sales 62 100
Cost of actual warranty claims (38) (68)
Ending balance $ 259 $ 221