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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	Feb. 22, 2020	May 25, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments		$ 5,981
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liability	$ 7,800	2,200
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments		$ 6,000

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