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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 28, 2018 | Apr. 29, 2017
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 7 years 9 months | 9 years 3 months 7 days
Gross Carrying Amount | $ 6,646 | $ 7,722
Accumulated Amortization | 2,964 | 2,187
Finite-Lived Intangible Assets, Accumulated Impairment Loss | 0 | 830
Definite-lived, Net Value | 3,682 | 4,705
Intangibles, net | $ 3,682 | $ 4,705
Trademarks |  |
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 20 years | 20 years
Gross Carrying Amount | $ 709 | $ 1,604
Accumulated Amortization | 118 | 429
Finite-Lived Intangible Assets, Accumulated Impairment Loss | 0 | 604
Definite-lived, Net Value | $ 591 | $ 571
Computer Software, Intangible Asset [Member] |  |
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 3 years | 3 years
Gross Carrying Amount | $ 2,978 | $ 2,814
Accumulated Amortization | 2,109 | 1,055
Finite-Lived Intangible Assets, Accumulated Impairment Loss | 0 | 0
Definite-lived, Net Value | $ 869 | $ 1,759
Customer Relationships [Member] |  |
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 10 years | 9 years 8 months 12 days
Gross Carrying Amount | $ 2,859 | $ 3,209
Accumulated Amortization | 637 | 608
Finite-Lived Intangible Assets, Accumulated Impairment Loss | 0 | 226
Definite-lived, Net Value | $ 2,222 | $ 2,375
Other |  |
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life (in years) | 1 year | 1 year
Gross Carrying Amount | $ 100 | $ 95
Accumulated Amortization | 100 | 95
Finite-Lived Intangible Assets, Accumulated Impairment Loss | 0 | 0
Definite-lived, Net Value | $ 0 | $ 0

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- Definition Finite-Lived Intangible Assets, Accumulated Impairment Loss + References No definition available. + Details
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- Definition [Line Items] for Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Table] + 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=66006027&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=66006027&loc=d3e16323-109275 + Details
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