Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts (USD $)	12 Months Ended
	Sep. 28, 2013		Sep. 29, 2012		Sep. 24, 2011
Allowance for Doubtful Accounts [Member]
Valuation Allowance [Line Items]
Opening balance	$ 987,000		$ 955,000		$ 893,000
Charged to expense	(70,000)		276,000		423,000
Deductions	63,000	[1]	244,000	[1]	361,000	[1]
Closing balance	854,000		987,000		955,000
Inventory Valuation Reserve [Member]
Valuation Allowance [Line Items]
Opening balance	3,883,000		4,615,000		4,189,000
Charged to expense	2,768,000		1,291,000		1,931,000
Deductions	2,202,000	[2]	2,023,000	[2]	1,505,000	[2]
Closing balance	$ 4,449,000		$ 3,883,000		$ 4,615,000

[1] Write-offs of uncollectible accounts receivable.

[2] Disposals of obsolete inventory.