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RESTRUCTURING AND ASSET IMPAIRMENTS - Narrative (Details) - USD ($) | Mar. 28, 2020 | Dec. 28, 2019 | Mar. 30, 2019 | Dec. 29, 2018
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Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance and other personnel related costs liability and lease obligation liabilities | $ 2,531,000 | $ 6,406,000 | $ 2,113,000 | $ 2,921,000
Accrued Compensation |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance and other personnel related costs liability and lease obligation liabilities | 2,400,000 |  | 1,800,000 |
Severance and Transition Costs | Other Noncurrent Liabilities |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance and other personnel related costs liability and lease obligation liabilities | $ 100,000 |  | $ 300,000 |

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