Receivables, Net (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020	Dec. 26, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers, trade	$ 39,916		$ 39,916		$ 31,074
Other receivables	2,138		2,138		1,920
Gross receivables	42,054		42,054		32,994
Less: allowance for doubtful accounts	(84)		(84)		(92)
Receivables, net	41,970		41,970		$ 32,902
Allowance for doubtful accounts [Abstract]
Bad debt expense	$ 4	$ 20	$ 414	$ (16)

Allowance for doubtful accounts [Abstract]

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Gross receivables

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount of allowance for credit loss on accounts receivable, classified as current.

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Amount due from parties in nontrade transactions, classified as other.

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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

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