The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived 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, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived 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, furniture and fixtures, and computer equipment.

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Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified											3 Months Ended		6 Months Ended
	Jun. 29, 2013	Dec. 29, 2012	Jun. 29, 2013 Land	Dec. 29, 2012 Land	Jun. 29, 2013 Buildings and improvements	Dec. 29, 2012 Buildings and improvements	Jun. 29, 2013 Equipment (including computer software)	Dec. 29, 2012 Equipment (including computer software)	Jun. 29, 2013 Projects under construction	Dec. 29, 2012 Projects under construction	Jun. 29, 2013 Software development costs	Jun. 30, 2012 Software development costs	Jun. 29, 2013 Software development costs	Jun. 30, 2012 Software development costs
Property and equipment
Property plant and equipment, gross	$ 24,734	$ 24,790	$ 1,140	$ 1,140	$ 3,273	$ 3,429	$ 20,258	$ 20,158	$ 63	$ 63
Less accumulated depreciation and amortization	(13,006)	(12,542)
Property plant and equipment, net	11,728	12,248
Estimated useful life													3 years
Costs capitalized											$ 39	$ 36	$ 63	$ 85