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Supplemental Financial Information (Schedule Of Potential Common Shares Excluded From The Diluted Net Loss Per Share Calculations) (Details) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Jul. 01, 2017
Jul. 02, 2016
Supplemental Financial Information        
Common share equivalents 13,006 12,976 13,155 12,892