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Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands | Oct. 28, 2018 | Apr. 29, 2018 | Oct. 29, 2017 | Apr. 30, 2017
--- | --- | --- | --- | ---
Intangible Assets [Line Items] |  |  |  |  |
Tradenames | $ 7,232 | $ 683 |  |  |
Intangible assets | 10,636 | 4,275 | [1] | $ 1,428 |
Customer Relationships [Member] |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Finite-lived intangible assets, net | 2,688 | 2,839 |  | 638 | $ 664
Non-Compete Agreement [Member] |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Finite-lived intangible assets, net | $ 716 | $ 753 |  | $ 790 | $ 828
[1] | Derived from audited financial statements.

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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://fasb.org/us-gaap/role/ref/legacyRef -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 Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a projected indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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