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REVENUES - General Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jul. 01, 2022 | Jun. 30, 2023 | Jul. 01, 2022 | Dec. 30, 2022
Revenue |  |  |  |  |
Payroll taxes, bonuses and employee benefit costs for all Company personnel | $ 22,416 | $ 20,439 | $ 44,801 | $ 39,796 |
Revenue of the entity recorded in which it acts solely in the capacity of an agent |  |  | 0 |  |
Retained accounts receivable | $ 12,500 |  | $ 12,500 |  | $ 8,500
Maximum |  |  |  |  |
Revenue |  |  |  |  |
Percent of revenue (as a percent) | 3.00% |  | 3.00% |  |
Minimum |  |  |  |  |
Revenue |  |  |  |  |
Percent of revenue (as a percent) | 2.00% |  | 2.00% |  |
Cost of Sales |  |  |  |  |
Revenue |  |  |  |  |
Payroll taxes, bonuses and employee benefit costs for all Company personnel |  |  | $ 0 |  |
Allocation of facilities costs to contract revenue |  |  | $ 0 |  |

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