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Summary Of Significant Accounting Policies (Calculation Of Net (Loss) Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 28, 2020	Nov. 23, 2019	Nov. 28, 2020	Nov. 23, 2019
Summary Of Significant Accounting Policies [Abstract]
Net (loss) income	$ (992)	$ 12,337	$ 1,292	$ 17,276
Basic:
Weighted average shares	32,356	31,984	32,270	31,852
Diluted:
Weighted average shares	32,356	31,984	32,270	31,852
Potentially dilutive shares		385	47	435
Total dilutive shares	32,356	32,369	32,317	32,287
Net income per common share:
Basic (per share)	$ (0.03)	$ 0.39	$ 0.04	$ 0.54
Dilutive (per share)	$ (0.03)	$ 0.38	$ 0.04	$ 0.54
Anti-dilutive shares not included above	5,083	4,809	5,185	3,684

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