Note 11 - Subsequent Event (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Aug. 26, 2012 sqft
Area of Real Estate Property	47,000
Long-term Purchase Commitment, Amount (in Dollars)	$ 3.5
After Expansion [Member]
Area of Real Estate Property	107,000

The minimum amount the entity agreed to spend under the long-term purchase commitment.

No definition available.

Name:	us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration