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Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Significant Unobservable Inputs Used in Discounted Cash Flow Models (Details)
12 Months Ended
May. 31, 2015
May. 25, 2014
Minimum [Member]    
Consolidated discount rates 15.00% 16.00%
Maximum [Member]    
Consolidated discount rates 21.00% 22.00%
Annual consolidated revenue growth rates 4.00% 4.00%
Annual consolidated expense growth rates 4.00% 4.00%
Consolidated income tax rates 15.00% 15.00%