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COMMON STOCK (Details) - shares
Sep. 24, 2023
Dec. 25, 2022
Class of Stock [Line Items]    
Total reserved shares of common stock 36,408,311 36,585,884
Shares available for future issuance under the 2021 Equity Incentive Plan    
Class of Stock [Line Items]    
Total reserved shares of common stock 10,201,747 10,655,568
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 13,471,636 13,813,922
Employee Stock    
Class of Stock [Line Items]    
Total reserved shares of common stock 4,111,331 3,000,000
Restricted Stock Units And Performance Share Units    
Class of Stock [Line Items]    
Total reserved shares of common stock 7,909,312 8,402,109