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Summary of Significant Accounting Policies, Cloud Computing Arrangements (Details) - USD ($)
12 Months Ended
Dec. 31, 2024
Dec. 26, 2023
Dec. 27, 2022
Summary of Significant Accounting Policies.      
Capitalized cloud computing implementation costs $ 5,900,000 $ 3,000,000  
Related amortization expense 3,900,000 1,400,000 $ 1,000,000
Deferred Income Tax, Valuation Allowance $ 0 $ 0