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Summary of Significant Accounting Policies (Details)
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3 Months Ended | |
|---|---|---|
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Apr. 28, 2012
Y
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Apr. 30, 2011
Y
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| Estimated the grant date fair value of stock options weighted-average assumptions | ||
| Volatility rate | 54.00% | 54.40% |
| Average risk-free interest rate | 1.60% | 2.80% |
| Average expected life (in years) | 6.3 | 6.3 |
| Dividend yield | ||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The range of expected volatilities used and the weighted-average expected volatility for an entity using a valuation technique with different volatilities during the contractual term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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