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Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable (Details Textual) - USD ($) $ in Thousands	Jun. 29, 2019	Dec. 29, 2018
Accounts Receivable, after Allowance for Credit Loss, Current, Total	$ 58,230	$ 52,335
Loss Contingency, Receivable, Ending Balance	11,200
Loss Contingency, Estimate of Possible Loss	10,300
Collectibility of Receivables [Member]
Loss Contingency, Estimate of Possible Loss	10,300
Transit Accounts Payable [Member]
Accounts Payable, Current, Total	2,700	2,500
Transit Accounts Receivable [Member]
Accounts Receivable, before Allowance for Credit Loss, Current	1,800	2,600
Accounts Receivable, after Allowance for Credit Loss, Current, Total	$ 900	$ 100

X

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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X

- Definition

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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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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