Major Customers and Export Sales - Foreign Revenue, as Percentage of Total Foreign Revenue by Geographic Area (Detail)	3 Months Ended
	Dec. 29, 2012	Dec. 24, 2011
Saudi Arabia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from foreign countries as a percentage of foreign revenue	92.00%	100.00%
Jordan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from foreign countries as a percentage of foreign revenue	8.00%