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Stockholders' Equity - Valuation Assumptions (Detail)	1 Months Ended			12 Months Ended
Stockholders' Equity - Valuation Assumptions (Detail)	Sep. 24, 2008	Jun. 27, 2008	Jun. 29, 2007	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%	0.00%	0.00%
Expected volatility	80.00%	80.00%	75.00%	85.00%	82.00%	80.00%
Average risk-free interest rate	2.26%	3.14%	4.28%	0.97%	1.82%	2.76%
Expected life (in years)	3 years	3 years	3 years	4 years 5 months 23 days	4 years 6 months	6 years 3 months

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.

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