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Stock-Based Compensation - Other Share-Based Arrangements - Narrative (Detail) - Stock Appreciation Rights (SARs) [Member] - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
May. 02, 2011 | Jul. 29, 2012 | Apr. 28, 2013
Share-based Goods and Nonemployee Services Transaction [Line Items] |  |  |
Agreement date | May 02, 2011 |  |
Number of shares indexed | 70,000 |  |
Cash settlement | $ 35,000 |  |
Stock appreciation right value | $ 700,000 |  |
Closing price of common stock at the date of grant | $ 10.00 |  |
Ceiling price of common stock under stock appreciation right award | $ 12.00 |  |
Payment for fully vested award at fair value |  | $ 174,000 |
Selling, general and administrative expenses [Member] |  |  |
Share-based Goods and Nonemployee Services Transaction [Line Items] |  |  |
Compensation expense |  |  | $ 40,000

X
- Definition The amount of expense reported during the period resulting from stock appreciation rights awarded to a non-employee. + References No definition available. + Details
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X
- Definition The number of entity's shares indexed to a stock appreciation right for a specific period of time. + References No definition available. + Details
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X
- Definition The closing price per share of the indexed shares associated with a stock appreciation right award, above which market price appreciation will inure to the benefit of the rights holder. + References No definition available. + Details
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- Definition The aggregate base value of the indexed shares associated with a stock appreciation right award, determined by applying the closing price per indexed share on the award date, above which market price appreciation will inure to the benefit of the rights holder. + References No definition available. + Details
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- Definition The agreed upon price per indexed share used in determining the maximum amount of benefit that will inure to the holder of stock appreciation rights. + References No definition available. + Details
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X
- Definition The fair value amount the entity paid to a non-employee when the terms of an award of stock appreciation rights were fully satisfied. + References No definition available. + Details
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- Definition The amount the entity agreed to pay to the holder of stock appreciation rights, regardless of the market price of the entity's stock. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition The date on which stock appreciation rights were awarded to non-employees. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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Period Type: |

X
- Details
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Period Type: |