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Composition Of Certain Financial Statement Captions (Schedule Of Inventories) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 28, 2018
Sep. 29, 2017
Composition Of Certain Financial Statement Captions [Abstract]    
Document Period End Date Sep. 28, 2018  
Raw materials $ 6,095 $ 6,812
Work in process 4,044 4,954
Finished goods 16,067 13,285
Inventories $ 26,206 $ 25,051