Income Taxes (Summary Of Net Operating Loss Expiration Periods) (Details) $ in Thousands	May 30, 2020 USD ($)
Income Taxes [Abstract]
2021	$ 3,936
2022	154
2023	251
2024	2,312
2025	540
2026-2029	1,917
Unlimited	44,083
Net operating loss carryforwards	$ 53,193

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

Name:	us-gaap_OperatingLossCarryforwards
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant