Nature of Operations and Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Nature Of Operations and Summary Of Significant Accounting Policies [Line Items]
Land	$ 2,049us-gaap_Land	$ 2,049us-gaap_Land
Buildings and leasehold improvements	16,951us-gaap_BuildingsAndImprovementsGross	16,028us-gaap_BuildingsAndImprovementsGross
Machinery and equipment	19,852us-gaap_MachineryAndEquipmentGross	17,927us-gaap_MachineryAndEquipmentGross
Total cost	38,852us-gaap_PropertyPlantAndEquipmentGross	36,004us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation and amortization	(27,256)	(25,369)
Property, Plant and Equipment	$ 11,596us-gaap_PropertyPlantAndEquipmentNet	$ 10,635us-gaap_PropertyPlantAndEquipmentNet

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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