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Significant Accounting Policies Significant Accounting Policies (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Share-based Compensation [Abstract]
Estimated forfeiture rate, minimum (as a percent)	0.00%
Estimated forfeiture rate, maximum (as a percent)	5.00%
Expected dividend yield (as a percent)	0.00%
Share-based compensation expense recognized	$ 4	$ 36

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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