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Summary of Short-Term Investments by Geographic Area (Detail) - USD ($) $ in Thousands	May 01, 2016	May 03, 2015
Schedule of Investments [Line Items]
short-term investments	$ 4,359	$ 10,004
Canada [Member]
Schedule of Investments [Line Items]
short-term investments	3,294	7,333
China [Member]
Schedule of Investments [Line Items]
short-term investments		1,612
United States [Member]
Schedule of Investments [Line Items]
short-term investments	$ 1,065	$ 1,059

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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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