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Property and Equipment - Components of Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 30, 2023
Dec. 31, 2022
Components of property and equipment    
Less: accumulated depreciation and amortization $ (13,740) $ (13,559)
Property and equipment, net 351 462
Equipment    
Components of property and equipment    
Property and equipment, gross 11,597 11,527
Leasehold Improvements    
Components of property and equipment    
Property and equipment, gross $ 2,494 $ 2,494