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Income Taxes - Deferred Tax Assets By Location (Details) - USD ($) $ in Thousands	Apr. 29, 2017	Apr. 30, 2016
Deferred Tax Assets By Location [Line Items]
Deferred tax assets, gross	$ 21,845	$ 21,445
International
Deferred Tax Assets By Location [Line Items]
Deferred tax assets, gross	$ 1,772

X

- Definition

[Line Items] for Deferred Tax Assets By Location [Table]

+ References

No definition available.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Deferred Tax Asset
-URI http://asc.fasb.org/extlink&oid=6510090

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