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Leases (Narrative) (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 28, 2020 USD ($) ft² | Nov. 23, 2019 USD ($) | Nov. 28, 2020 USD ($) ft² | Nov. 23, 2019 USD ($)
Area of real estate property | ft² | 57,000 |  | 57,000 |
Rental income | $ 55,000 | $ 70,000 | $ 110,000 | $ 106,000
Expected rental income from third party leases in fiscal 2021 | 107,000 |  | 107,000 |
Expected rental income from third party leases in fiscal 2022 | 219,000 |  | 219,000 |
Expected rental income from third party leases in fiscal 2023 | 226,000 |  | 226,000 |
Expected rental income from third party leases in fiscal 2024 | 232,000 |  | 232,000 |
Expected rental income from third party leases in fiscal 2025 | $ 78,000 |  | $ 78,000 |
Leases To Independent Third Parties [Member] |  |  |  |
Area of real estate property | ft² | 13,000 |  | 13,000 |

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- Definition Amount of lease payment to be received by lessor for operating lease in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919396-209981 + Details
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- Definition Amount of lease payment to be received by lessor for operating lease in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919396-209981 + Details
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