Commitments and Contingencies- Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 02, 2012	Feb. 04, 2011 Washington State
Commitments and Contingencies Disclosure [Line Items]
Damages sought	$ 10
Possible loss in case of assessment by State of Washington		$ 3.3

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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