Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013 item	Jun. 30, 2012	Dec. 29, 2012
Business segments and significant customers
Number of reportable segments			2
Net revenues from external customers	$ 53,677	$ 48,016	$ 102,214	$ 95,036
Depreciation and amortization included in segment gross profit	811	718	1,555	1,424
Segment gross profit	9,136	9,204	17,961	18,549
Goodwill	14,763	11,616	14,763	11,616	11,616
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit	9,136	9,204	17,961	18,549
Selling, general and administrative expenses	(6,889)	(6,379)	(13,846)	(12,880)
Interest expense, net	(171)	(204)	(391)	(434)
Income before income tax provision	2,076	2,621	3,724	5,235
Frozen Products
Business segments and significant customers
Net revenues from external customers	27,921	23,194	54,557	46,005
Depreciation and amortization included in segment gross profit	287	217	536	433
Segment gross profit	4,446	3,810	9,394	8,060
Goodwill	8,777	5,630	8,777	5,630
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit	4,446	3,810	9,394	8,060
Snack Products
Business segments and significant customers
Net revenues from external customers	25,756	24,822	47,657	49,031
Depreciation and amortization included in segment gross profit	524	501	1,019	991
Segment gross profit	4,690	5,394	8,567	10,489
Goodwill	5,986	5,986	5,986	5,986
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit	$ 4,690	$ 5,394	$ 8,567	$ 10,489

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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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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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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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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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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