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Other Financial Information (Supplemental Cash Flow Information) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 29, 2017
Sep. 30, 2016
Other Financial Information [Abstract]    
Working capital $ 9,121 $ 10,023
Property and equipment 912 879
Noncurrent assets 35,976 8,192
Deferred liabilities (273)  
Goodwill $ 104,454 $ 30,849