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Summary of Short-Term Investments by Geographic Area (Detail) - USD ($) $ in Thousands	May. 03, 2015	Apr. 27, 2014
Schedule of Investments [Line Items]
short-term investments	$ 10,004	$ 6,294
Canada [Member]
Schedule of Investments [Line Items]
short-term investments	7,333	5,247
China [Member]
Schedule of Investments [Line Items]
short-term investments	1,612
United States [Member]
Schedule of Investments [Line Items]
short-term investments	$ 1,059	$ 1,047

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- Definition

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- Definition

Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.2)



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 1



-Subparagraph g



-Article 7

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