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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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May. 02, 2015 | Apr. 26, 2014 | Apr. 27, 2013
Income Tax Disclosure [Abstract] |  |  |
Deferred tax asset valuation allowance | $ 52 | $ 2,297 |
Undistributed Earnings of Foreign Subsidiaries | 10,437 |  |
Operating Loss Carryforwards [Line Items] |  |  |
Deferred tax assets, gross | 18,315 | 21,931 |
Interest and penalties | 14 | 20 | $ 10
Accrued interest or penalties | 16 | $ 15 |
International |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | 2,386 |  |
Deferred tax assets, gross | $ 800 |  |

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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=6907707&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 + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + 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 (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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