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REVENUE - Narrative (Details) - USD ($) $ in Thousands | Sep. 23, 2020 | Dec. 25, 2019
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Other long-term liabilities | $ 21,828 | $ 15,328
Other current liabilities | 12,580 | $ 19,499
Revenue, remaining performance obligation | $ 17,048 |

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