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Long-Term Debt - Schedule of Long-term debt and short-term borrowings (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 28, 2024
Dec. 28, 2023
Debt Disclosure [Abstract]    
Principal and interest payments $ 39 $ 39
Interest rate of unsecured term note (as percent) 5.75% 5.75%
Senior notes $ 70,000 $ 70,000
Unsecured term note due February 2025, with monthly principal and interest payments of $39, bearing interest at 5.75% 418 528
Convertible senior notes 100,050 100,050
Payroll Protection Program loans 1,004 1,233
Revolving credit agreement 0 0
Debt issuance costs (1,693) (1,960)
Total debt, net of debt issuance costs 169,779 169,851
Less current maturities, net of issuance costs 10,273 10,303
Long-term debt $ 159,506 $ 159,548