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Summary of Significant Accounting Policies (Details)
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6 Months Ended | |
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Jul. 28, 2012
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Jul. 30, 2011
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| Estimated the grant date fair value of stock options weighted-average assumptions | ||
| Volatility rate | 53.30% | 54.20% |
| Average risk-free interest rate | 1.20% | 2.40% |
| Average expected life (in years) | 6 years 3 months 18 days | 6 years 3 months 18 days |
| 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
Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. 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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