Stock Based Compensation (Narrative) (Details) - Restricted Shares - USD ($) $ in Thousands	3 Months Ended
Aug. 29, 2020	Sep. 01, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense (benefit)	$ 893	$ 891
Unrecognized compensation expense	$ 5,300
Weighted average period of unrecognized compensation expense (in years)	1 year 10 months 24 days

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-Section S99
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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