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Basis of Presentation and General Information (Gain and Loss Results for Discontinued Operations) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Jan. 01, 2021 | Dec. 27, 2019
Cost of service: |  |  |
Loss from discontinued operations | $ (7) | $ (172) | $ (6)
European REL Working Capital group [Member] |  |  |
Revenue: |  |  |
Total revenue |  |  | 92
Cost of service: |  |  |
Total cost of service | 7 | 8 | 45
Selling, general and administrative costs |  | 165 | 52
Total costs and operating expenses | 7 | 173 | 97
Loss from discontinued operations before income taxes | (7) | (173) | (5)
Income tax (benefit) expense |  | (1) | 1
Loss from discontinued operations | (7) | (172) | (6)
European REL Working Capital group [Member] | Revenue Before Reimbursements [Member] |  |  |
Revenue: |  |  |
Total revenue |  |  | 75
European REL Working Capital group [Member] | Reimbursements [Member] |  |  |
Revenue: |  |  |
Total revenue |  |  | 17
Cost of service: |  |  |
Total cost of service |  |  | 17
European REL Working Capital group [Member] | Cost Before Reimbursements [Member] |  |  |
Cost of service: |  |  |
Total cost of service | $ 7 | $ 8 | $ 28

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