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REVENUE - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 30, 2020
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Other long-term liabilities | $ 22,297 | $ 24,460
Other current liabilities | 15,087 | $ 14,200
Revenue, remaining performance obligation | $ 16,748 |

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