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Weighted Average Assumptions Used for Option Grants (Detail)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend Yield	0.00%	0.00%
Risk-Free Interest Rate	0.70%	2.50%
Expected Volatility	58.80%	58.80%
Expected Life (in Years)	5 years	6 years 6 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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