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ACCRUED PAYROLL AND EXPENSES, OTHER LONG-TERM LIABILITIES, AND CONTINGENT CONSIDERATION - Schedule of Future Estimated Earn Out Payments (Details) - USD ($) | Jun. 27, 2021 | Dec. 27, 2020
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Accrued Liabilities, Current [Abstract] |  |
Estimated Cash Payment, 2021 | $ 2,360,000 |
Discount, 2021 | 144,460 |
Net, Less than one year | 2,215,540 | $ 0
Estimated Cash Payment, 2022 | 1,110,000 |
Discount, 2022 | (161,292) |
Net, 2022 | 948,708 |
Estimated Cash Payment, Total | 3,470,000 |
Discount, Total | (305,752) |
Contingent consideration, less current portion | $ 3,164,248 |

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