Provision for United States Federal, State and Foreign Taxes on Income Summary (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012
Current:
Federal			$ (351)
State	39	(64)	67
Foreign	48	50	293
Current taxes	87	(14)	9
Deferred:
Federal	0	0	0
State	0	0	0
Foreign	250	56	733
Deferred taxes	250	56	733
Provision (benefit) for income taxes	$ 337	$ 42	$ 742