Amortization of License Agreements Included in Cost of Goods Sold (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 28, 2012	Dec. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Amortization expense of licensed intangibles	$ 659	$ 643
Cost of Goods Sold
Finite-Lived Intangible Assets [Line Items]
Amortization expense of licensed intangibles	$ 659	$ 643