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COMMON STOCK - Schedule of Reserved shares of Common Stock For Issuance (Details) - shares
Dec. 28, 2025
Dec. 29, 2024
Class of Stock [Line Items]    
Total reserved shares of common stock 30,367,496 31,707,440
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 6,652,380 8,516,216
Shares reserved for achievement of Spyce milestones    
Class of Stock [Line Items]    
Total reserved shares of common stock 250,000 500,000
Options    
Class of Stock [Line Items]    
Total reserved shares of common stock 14,070,559 13,169,869
Shares reserved for employee stock purchase plan    
Class of Stock [Line Items]    
Total reserved shares of common stock 4,111,331 4,111,331
RSUs and PSUs outstanding under the 2019 Equity Incentive Plan and 2021 Equity Incentive Plan    
Class of Stock [Line Items]    
Total reserved shares of common stock 5,283,226 5,410,024