Receivables, Net (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Dec. 29, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers, trade	$ 42,844		$ 42,844		$ 40,121
Other receivables	2,418		2,418		2,595
Gross receivables	45,262		45,262		42,716
Less: allowance for doubtful accounts	(282)		(282)		(174)
Receivables, net	44,980		44,980		$ 42,542
Allowance for doubtful accounts [Abstract]
Bad debt expense	$ 51	$ 20	$ 182	$ 137

Allowance for doubtful accounts [Abstract]

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- Definition

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.

+ References

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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- Definition

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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