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Summary Of Significant Accounting Policies (Financial Instruments Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Thousands
May 25, 2019
May 26, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term investments $ 5,981  
Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term investments 5,981  
Total assets 5,981  
Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Contingent consideration liability 2,195 $ 4,289
Total liabilities $ 2,195 $ 4,289