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Debt - Future Principle and Interest Payments (Details) - USD ($) $ in Thousands	Dec. 25, 2021	Dec. 26, 2020
Debt Instrument [Line Items]
Principal, 2022	$ 8,935
Principal, 2023	1,050
Principal, 2024	1,080
Principal, 2025	1,111
Principal, 2026	1,142
Principal, 2027 and thereafter	11,117
Principal, total	24,435	$ 34,569
Interest, 2022	361
Interest, 2023	282
Interest, 2024	263
Interest, 2025	240
Interest, 2026	220
Interest, 2027 and thereafter	930
Interest, total	2,296
Total payments, 2022	9,296
Total payments, 2023	1,332
Total payments, 2024	1,343
Total payments, 2025	1,351
Total payments, 2026	1,362
Total payments, 2027 and thereafter	12,047
Long-term debt, maturities, total payments due	26,731
FRT Term Loan
Debt Instrument [Line Items]
Principal, total	$ 7,900
Interest rate at period end	1.20%
Building Term Loan
Debt Instrument [Line Items]
Principal, total	$ 16,500
Interest rate at period end	1.85%

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