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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.

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