Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands		Feb. 26, 2017	May 29, 2016
Investment in non-public company		$ 63,400	$ 62,700	[1]
Fair Value, Inputs, Level 1 [Member]
Investment in non-public company
Total
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Interest rate swap (1)	[2]
Fair Value, Inputs, Level 2 [Member]
Investment in non-public company
Total		681
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Interest rate swap (1)	[2]	681
Fair Value, Inputs, Level 3 [Member]
Investment in non-public company		63,400	62,700
Total		63,400	62,700
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Interest rate swap (1)	[2]

[1] Derived from audited financial statements. See Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies for discussion of accounting guidance adopted during the period.

[2] Recorded in Other assets.