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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