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Schedule II-Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Allowance for doubtful accounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning of period $ 143 $ 504 $ 937
Charged to Costs and Expenses 478 (320) (371)
Other Additions 0 0 0
Other Deductions [1] 0 (41) (62)
End of period 621 143 504
Inventory reserve [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning of period 13,863 14,120 18,617
Charged to Costs and Expenses 3,978 3,060 3,561
Other Additions 7,696 0 0
Other Deductions [2] (6,464) (3,317) (8,058)
End of period 19,073 13,863 14,120
Valuation allowance for deferred taxes [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning of period 24,624 26,444 25,015
Charged to Costs and Expenses [3] 2,634 (1,820) 1,429
Other Additions 0 0 0
Other Deductions 0 0 0
End of period $ 27,258 $ 24,624 $ 26,444
[1] Represents write-offs of specific accounts receivable.
[2] Sale or scrap of previously reserved inventory.
[3] Reflects increase/decrease in the valuation allowance primarily associated with the Company's U.S. and foreign net operating losses and other deferred tax assets.