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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
Nov. 27, 2016
May 29, 2016
Assets:    
Investment in non-public company $ 62,700 $ 62,700 [1]
Fair Value, Inputs, Level 1 [Member]    
Assets:    
Investment in non-public company
Total
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]    
Assets:    
Interest rate swap (1) [2]
Fair Value, Inputs, Level 2 [Member]    
Assets:    
Investment in non-public company
Total 519
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]    
Assets:    
Interest rate swap (1) [2] 519
Fair Value, Inputs, Level 3 [Member]    
Assets:    
Investment in non-public company 62,700 62,700
Total 62,700 62,700
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]    
Assets:    
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.