Long-Term Debt - Schedule of Long-term debt and short-term borrowings (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 30, 2023	Jun. 29, 2023	Dec. 29, 2022
Debt Disclosure [Abstract]
Principal and interest payments		$ 39	$ 39
Interest rate of unsecured term note	5.75%	5.75%
Senior notes		$ 80,000	80,000
Unsecured term note due February 2025, with monthly principal and interest payments of $39, bearing interest at 5.75%		744	954
Convertible senior notes		100,050	100,050
Payroll Protection Program loans		1,687	2,240
Revolving credit agreement		0	0
Debt issuance costs		(2,306)	(2,807)
Total debt, net of debt issuance costs		180,175	180,437
Less current maturities, net of issuance costs		10,391	10,432
Long-term debt		$ 169,784	$ 170,005

The interest rate of unsecured term note.

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Carrying amount of loans granted under Payroll Protection Program under the CARES Act, with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion.

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Carrying value as of the balance sheet date of unsecured notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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No definition available.

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- Definition

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Amount of the total principal payments made during the annual reporting period.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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