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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Detail) - Summary of Significant Unobservable Inputs Used in Discounted Cash Flow Models
9 Months Ended 12 Months Ended
Feb. 24, 2013
May 27, 2012
Income tax rates 15.00% 25.00%
Minimum [Member]
   
Revenue growth rates 3.00% 3.00%
Expense growth rates 3.00% 3.00%
Discount rates 19.00% 14.00%
Maximum [Member]
   
Revenue growth rates 12.00% 24.00%
Expense growth rates 9.00% 18.00%
Discount rates 29.00% 21.00%