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Segment Information - International net sales (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 27, 2014 | Jan. 26, 2014 | Oct. 27, 2013 | Jul. 28, 2013 | Apr. 28, 2013 | Jan. 27, 2013 | Oct. 28, 2012 | Jul. 29, 2012 | Apr. 27, 2014 | Apr. 28, 2013 | Apr. 29, 2012
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales | $ 74,043 | $ 72,389 | $ 70,589 | $ 70,141 | $ 70,375 | $ 63,695 | $ 65,560 | $ 69,184 | $ 287,162 | $ 268,814 | $ 254,443
North america (excluding USA) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales |  |  |  |  |  |  |  |  | 15,556 | 11,900 | 10,417
Far east and asia [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales |  |  |  |  |  |  |  |  | 33,487 | 43,907 | 38,279
All other areas [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales |  |  |  |  |  |  |  |  | 6,041 | 5,806 | 5,353
International [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
net sales |  |  |  |  |  |  |  |  | $ 55,084 | $ 61,613 | $ 54,049

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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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