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Summary of Significant Accounting Policies - Summary of Estimated Useful Lives or Expected Lease Term (Detail)
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12 Months Ended |
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Feb. 01, 2014
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Equipment and fixtures [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives or the expected lease term | 3 years |
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Equipment and fixtures [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives or the expected lease term | 10 years |
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Leasehold improvements [Member] | Average [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives or the expected lease term | 10 years |
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Electronic equipment and software [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives or the expected lease term | 3 years |
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Electronic equipment and software [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives or the expected lease term | 5 years |