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COMMON STOCK (Details) - shares | Sep. 25, 2022 | Dec. 26, 2021
--- | --- | ---
Class of Stock [Line Items] |  |
Total reserved shares of common stock | 36,967,090 | 38,660,730
Shares available for future issuance under the 2019 Equity Incentive Plan and 2021 Equity Incentive Plan |  |
Class of Stock [Line Items] |  |
Total reserved shares of common stock | 11,157,109 | 12,159,177
Shares reserved for achievement of Spyce milestones |  |
Class of Stock [Line Items] |  |
Total reserved shares of common stock | 714,285 | 714,285
Stock Options |  |
Class of Stock [Line Items] |  |
Total reserved shares of common stock | 13,410,616 | 13,773,414
Employee Stock |  |
Class of Stock [Line Items] |  |
Total reserved shares of common stock | 3,000,000 | 3,000,000
Restricted Stock Units And Performance Share Units |  |
Class of Stock [Line Items] |  |
Total reserved shares of common stock | 8,685,080 | 9,013,854

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