Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 28, 2015 segment	Mar. 29, 2014	Dec. 27, 2014
Business segments and significant customers
Number of reportable segments	2us-gaap_NumberOfReportableSegments
Net revenues from external customers	$ 77,607us-gaap_SalesRevenueGoodsNet	$ 67,509us-gaap_SalesRevenueGoodsNet
Depreciation and amortization included in segment gross profit	1,162	1,052
Segment gross profit	(3,700)us-gaap_GrossProfit	11,563us-gaap_GrossProfit
Goodwill	23,286us-gaap_Goodwill		23,286us-gaap_Goodwill
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit	(3,700)us-gaap_GrossProfit	11,563us-gaap_GrossProfit
Operating expenses	18,429us-gaap_OperatingExpenses	8,398us-gaap_OperatingExpenses
Interest expense, net	730	670
Income (loss) before income tax	(22,859)	2,495
Frozen Products
Business segments and significant customers
Net revenues from external customers	51,349	43,655
Depreciation and amortization included in segment gross profit	556	475
Segment gross profit	(7,489)	7,844
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit	(7,489)	7,844
Snack Products
Business segments and significant customers
Net revenues from external customers	26,258	23,854
Depreciation and amortization included in segment gross profit	606	577
Segment gross profit	3,788	3,719
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit	$ 3,788	$ 3,719

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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The net amount of nonoperating interest income (expense).

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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