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Stock-Based Compensation (Schedule of Allocation of Recognized Period Cost) (Details) (USD $)	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total costs and expenses	$ 2,003,000	$ 1,676,000	$ 2,418,000
Cost of revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total costs and expenses	179,000	131,000	169,000
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total costs and expenses	455,000	458,000	645,000
Selling, general and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total costs and expenses	$ 1,369,000	$ 1,087,000	$ 1,604,000

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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