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Intangible Assets - Narrative (Detail) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Aug. 04, 2019 | Apr. 28, 2019 | Jul. 29, 2018
Intangible Assets [Line Items] |  |  |
Gross carrying amount of customer relationships | $ 3,100,000 | $ 3,100,000 | $ 3,100,000
Gross carrying amount of non-compete agreement | 2,000,000 | 2,000,000 | 2,000,000
Customer Relationships [Member] |  |  |
Intangible Assets [Line Items] |  |  |
Accumulated amortization | 652,000 | 577,000 | 351,000
Remaining amortization expense for the fiscal year | 226,000 |  |
Remaining amortization expense for the second fiscal year | 301,000 |  |
Remaining amortization expense for the third fiscal year | 301,000 |  |
Remaining amortization expense for the fourth fiscal year | 301,000 |  |
Remaining amortization expense for the fifth fiscal year | 301,000 |  |
Remaining amortization expense for the fiscal year thereafter | $ 1,033,000 |  |
Weighted average remaining amortization period | 8 years 4 months 24 days |  |
Customer Relationships [Member] | Maximum [Member] |  |  |
Intangible Assets [Line Items] |  |  |
Useful life | 17 years |  |
Customer Relationships [Member] | Minimum [Member] |  |  |
Intangible Assets [Line Items] |  |  |
Useful life | 9 years |  |
Non-Compete Agreement [Member] |  |  |
Intangible Assets [Line Items] |  |  |
Useful life | 15 years |  |
Accumulated amortization | $ 1,400,000 | $ 1,400,000 | $ 1,300,000
Remaining amortization expense for the fiscal year | 57,000 |  |
Remaining amortization expense for the second fiscal year | 75,000 |  |
Remaining amortization expense for the third fiscal year | 75,000 |  |
Remaining amortization expense for the fourth fiscal year | 75,000 |  |
Remaining amortization expense for the fifth fiscal year | 75,000 |  |
Remaining amortization expense for the fiscal year thereafter | $ 302,000 |  |
Weighted average remaining amortization period | 8 years 9 months 18 days |  |

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- Definition Gross carrying amount before accumulated amortization as of the balance sheet date to an asset acquired in a business combination representing a favorable existing relationship with customers having a finite beneficial 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 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/disclosureRef -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 of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Gross carrying amount before accumulated amortization as of the balance sheet date of payments made to third parties in exchange for their agreement not to engage in specified competitive practices in specified geographic territories for a specified period of time. + 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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