XML 25 R52.htm IDEA: XBRL DOCUMENT

Stock-Based Compensation (Schedule of Valuation Assumptions) (Details)	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	6 years 3 months 18 days	5 years 8 months 9 days	5 years 5 months 1 day
Risk-free interest rate	0.98%	1.16%	2.40%
Expected volatility	61.00%	61.00%	58.00%
Expected dividend	0.00%	0.00%	0.00%
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	6 months	6 months 3 days	5 months 29 days
Risk-free interest rate	0.14%	0.08%	0.19%
Expected volatility	56.00%	56.00%	60.00%
Expected dividend	0.00%	0.00%	0.00%

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References+ Details