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Segment Information - International net sales (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
May. 03, 2015 | Feb. 01, 2015 | Nov. 02, 2014 | Aug. 03, 2014 | Apr. 27, 2014 | Jan. 26, 2014 | Oct. 27, 2013 | Jul. 28, 2013 | May. 03, 2015 | Apr. 27, 2014 | Apr. 28, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales | $ 78,846 | $ 81,269 | $ 73,991 | $ 76,060 | $ 74,043 | $ 72,389 | $ 70,589 | $ 70,141 | $ 310,166 | $ 287,162 | $ 268,814
Mexico [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales |  |  |  |  |  |  |  |  | 24,100 | 9,300 | 3,200
China [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales |  |  |  |  |  |  |  |  | $ 26,500 | $ 32,200 | $ 42,100

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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