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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 27, 2023 USD ($) | Jun. 28, 2023 USD ($) | Mar. 29, 2023 USD ($) | Sep. 28, 2022 USD ($) | Jun. 29, 2022 USD ($) | Mar. 30, 2022 USD ($) | Dec. 27, 2023 USD ($) operating_segment reportable_segment renewal_option | Dec. 28, 2022 USD ($) | Dec. 29, 2021 USD ($)
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
General and administrative expenses | $ 30,939 | $ 31,476 | $ 31,311 | $ 26,931 | $ 29,487 | $ 31,386 | $ 129,542 | $ 120,009 | $ 87,196
Number of operating segments | operating_segment |  |  |  |  |  |  | 1 |  |
Number of reportable segments | reportable_segment |  |  |  |  |  |  | 1 |  |
Capitalized implementation costs |  |  |  |  |  |  | $ 5,572 | 6,212 |
Indefinite-lived intangible assets |  |  |  |  |  |  | 1,903 | 1,837 |
Gift card breakage income |  |  |  |  |  |  | 327 | 1,472 |
Cumulative catch-up adjustment |  |  |  |  |  |  |  | 1,281 |
Advertising and promotions |  |  |  |  |  |  | $ 12,437 | 12,376 | 5,677
Number of renewal options | renewal_option |  |  |  |  |  |  | 2 |  |
Period of renewal term |  |  |  |  |  |  | 5 years |  |
Maximum |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Terms of lease contract (in years) |  |  |  |  |  |  | 15 years |  |
Maximum | Furniture and fixtures |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property and equipment (in years) |  |  |  |  |  |  | 7 years |  |
Maximum | Equipment |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property and equipment (in years) |  |  |  |  |  |  | 7 years |  |
Maximum | Computer equipment and software |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property and equipment (in years) |  |  |  |  |  |  | 5 years |  |
Minimum |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Terms of lease contract (in years) |  |  |  |  |  |  | 10 years |  |
Minimum | Furniture and fixtures |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property and equipment (in years) |  |  |  |  |  |  | 5 years |  |
Minimum | Equipment |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property and equipment (in years) |  |  |  |  |  |  | 5 years |  |
Minimum | Computer equipment and software |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property and equipment (in years) |  |  |  |  |  |  | 2 years |  |
Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Net assets of SSE Holdings |  |  |  |  |  |  | $ 388,250 | 362,571 |
Revision of Prior Period, Reclassification, Adjustment |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
General and administrative expenses |  |  |  |  |  |  |  | $ 1,219 | $ 1,200

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