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Dividend Program (Detail) (USD $) | 3 Months Ended |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 28, 2013 | Jul. 29, 2012 | Jun. 12, 2013 | Jul. 28, 2013 Quarterly Dividend [Member] | Jul. 29, 2012 Quarterly Dividend [Member] | Apr. 28, 2013 Quarterly Dividend [Member]
Dividends [Line Items] |  |  |  |  |  |
Percentage increase in payment of quarterly cash dividend |  |  | 33.00% |  |  |
Cash dividend payment per share |  |  |  | $ 0.04 |  | $ 0.03
Cash dividends paid | $ 489,000 | $ 381,000 |  | $ 489,000 | $ 381,000 |

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