Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Assumptions Used in Discounted Cash Flow Models (Details) $ in Millions	Feb. 25, 2018 USD ($)
10% increase in revenue growth rates	$ 9.4
10% increase in expense growth rates	(8.8)
10% increase in income tax rates	(0.5)
10% increase in discount rates	$ (4.2)