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Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Allowance for Doubtful Accounts [Member]
      
Valuation Allowance [Line Items]      
Opening Balance $ 854,000 $ 987,000 $ 955,000
Charged to Expense 161,000 (70,000) 276,000
Deductions 565,000 [1] 63,000 [1] 244,000 [1]
Closing Balance 450,000 854,000 987,000
Inventory Valuation Reserve [Member]
      
Valuation Allowance [Line Items]      
Opening Balance 4,449,000 3,883,000 4,615,000
Charged to Expense 2,626,000 2,768,000 1,291,000
Deductions 3,093,000 [2] 2,202,000 [2] 2,023,000 [2]
Closing Balance $ 3,982,000 $ 4,449,000 $ 3,883,000
[1] Write-offs of uncollectible accounts receivable.
[2] Disposals of obsolete inventory.