XML 25 R43.htm IDEA: XBRL DOCUMENT

Share-based Compensation (Schedule of Fair Value Assumptions for Stock Options and Employee Stock Purchase Plan Awards) (Details)	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Jan. 01, 2012	Dec. 31, 2012	Jan. 01, 2012
Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected life	4 years	5 years	5 years	5 years
Risk-free interest rate (percent)	0.57%	1.00%	0.71%	1.09%
Volatility (percent)	63.00%	61.00%	64.00%	59.00%
Dividend yield (percent)	0.00%	0.00%	0.00%	0.00%
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected life	3 months	3 months	3 months	3 months
Risk-free interest rate (percent)	0.04%	0.04%	0.05%	0.04%
Volatility (percent)	50.00%	79.00%	59.00%	70.00%
Dividend yield (percent)	0.00%	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