XML 48 R36.htm IDEA: XBRL DOCUMENT

Shareholders' Equity - Weighted- Average Assumptions for Determining Fair Value (Detail) (USD $)	3 Months Ended
	Apr. 28, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Expected life	4 years
Expected volatility	87.00%
Risk-free interest rate	0.92%
Expected dividends

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