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Segment Information - International net sales (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2017 | Jan. 29, 2017 | Oct. 30, 2016 | Jul. 31, 2016 | May 01, 2016 | Jan. 31, 2016 | Nov. 01, 2015 | Aug. 02, 2015 | Apr. 30, 2017 | May 01, 2016 | May 03, 2015
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales | $ 77,350 | $ 76,169 | $ 75,343 | $ 80,682 | $ 77,253 | $ 78,466 | $ 76,956 | $ 80,185 | $ 309,544 | $ 312,860 | $ 310,166
Mexico [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales |  |  |  |  |  |  |  |  | 22,300 | 24,200 | 24,100
China [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales |  |  |  |  |  |  |  |  | $ 26,600 | $ 23,100 | $ 26,500

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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=63488584&loc=d3e20235-122688 + Details
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