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Other Assets - Narrative (Detail) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 02, 2014 USD ($) | May 01, 2016 USD ($) Contract | May 03, 2015 USD ($) Contract | Apr. 27, 2014 USD ($) | May 16, 2014 USD ($)
Other Assets [Line Items] |  |  |  |  |
Gross carrying amount of non-compete agreement |  | $ 2,000,000 | $ 2,000,000 |  |
Gross carrying amount of customer relationships |  | $ 868,000 | 868,000 |  |
Death benefits to beneficiary of insured on terminated life insurance agreement |  |  |  |  | $ 2,500,000
Collection of cash surrender value from termination of split dollar life insurance agreement | $ 320,000 |  | $ 320,000 |  |
Number of life insurance contracts owned | Contract |  | 1 | 1 |  |
Life insurance contracts, death benefits to insured |  | $ 1,400,000 | $ 1,400,000 |  |
Life insurance contracts, cash surrender value |  | $ 357,000 | 339,000 |  |
Non-compete Agreement [Member] |  |  |  |  |
Other Assets [Line Items] |  |  |  |  |
Useful life |  | 15 years |  |  |
Accumulated amortization |  | $ 1,100,000 | 1,100,000 |  |
Amortization expense |  | 75,000 | 75,000 | $ 75,000 |
Remaining amortization expense for the next fiscal year |  | 75,000 |  |  |
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 |  | $ 528,000 |  |  |
Weighted average remaining amortization period |  | 12 years |  |  |
Customer Relationships [Member] |  |  |  |  |
Other Assets [Line Items] |  |  |  |  |
Useful life |  | 17 years |  |  |
Accumulated amortization |  | $ 153,000 | 102,000 |  |
Amortization expense |  | 51,000 | $ 51,000 | $ 51,000 |
Remaining amortization expense for the next fiscal year |  | 51,000 |  |  |
Remaining amortization expense for the second fiscal year |  | 51,000 |  |  |
Remaining amortization expense for the third fiscal year |  | 51,000 |  |  |
Remaining amortization expense for the fourth fiscal year |  | 51,000 |  |  |
Remaining amortization expense for the fifth fiscal year |  | 51,000 |  |  |
Remaining amortization expense for the fiscal year thereafter |  | $ 460,000 |  |  |
Weighted average remaining amortization period |  | 14 years |  |  |

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- Definition The amount of proceeds the beneficiary would have received, had the policy not been terminated, upon the death of the insured. + References No definition available. + 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://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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