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Common Stock Options (Schedule of Fair Value of Option Award Granted Weighted Average Assumptions) (Detail)	3 Months Ended		12 Months Ended
	May 04, 2013	Apr. 28, 2012	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected volatility	50.00%	50.00%	50.00%	50.00%	50.00%
Risk-free interest rate	1.10%	1.50%	1.30%	2.00%	1.80%
Expected life of options	6 years 3 months 18 days	7 years	6 years 3 months 18 days	7 years	7 years
Expected dividend yield	0.00%	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.

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