Leases - Future maturities of lease liabilities (Details) - USD ($) $ in Thousands	Sep. 24, 2022	Dec. 25, 2021
Operating Leases
Remainder of 2022	$ 1,050
2023	4,062
2024	3,493
2025	2,982
2026	3,005
Thereafter	6,920
Total lease payments	21,512
Less: Interest	(3,302)
Present value of lease liabilities	18,210
Finance Leases
Remainder of 2022	151
2023	609
2024	557
2025	549
2026	520
Thereafter	18,970
Total lease payments	21,356
Less: Interest	(14,320)
Present value of lease liabilities	$ 7,036	$ 7,095