Long-term Debt Outstanding (Detail) (USD $)	Sep. 28, 2012	Sep. 30, 2011
Debt Instrument [Line Items]
Long-term Debt	$ 6,300,000	$ 16,100,000
Less: current maturities of long-term debt	0	9,876,000
Long-term debt	6,250,000	6,250,000
Unsecured term loan, 6.70% due in one installment of $6.25 payable in fiscal year 2014
Debt Instrument [Line Items]
Unsecured term loan	6,300,000	12,500,000
Loan assumed through purchase of land and building, 7.34% was fully paid in fiscal year 2012
Debt Instrument [Line Items]
Secured loans	$ 0	$ 3,600,000