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Long-Lived Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
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May. 02, 2015 | Apr. 26, 2014
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 17 years |
Gross Carrying Amount | $ 2,069 | $ 4,146
Accumulated Amortization | 245 | 1,867
Definite-lived, Net Value | 1,824 | 2,279
Indefinite-lived assets | 0 | 401
Definite-lived and Indefinite lived, Gross Carrying Amount | 2,069 | 4,547
Intangibles, net | $ 1,824 | 2,680
Patents |  |
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 10 years |
Gross Carrying Amount | $ 0 | 2,282
Accumulated Amortization | 0 | 1,730
Definite-lived, Net Value | $ 0 | 552
Trademarks |  |
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 20 years |
Gross Carrying Amount | $ 1,461 | 1,216
Accumulated Amortization | 116 | 59
Definite-lived, Net Value | $ 1,345 | 1,157
Other |  |
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 10 years |
Gross Carrying Amount | $ 608 | 648
Accumulated Amortization | 129 | 78
Definite-lived, Net Value | $ 479 | $ 570

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- Definition Finite-Lived Intangible Assets and Indefinite-Lived Intangible Assets, Net + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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