Organization and Significant Accounting Policies Other - Recently Adopted Accounting Standards (Details) - USD ($)	6 Months Ended
Oct. 27, 2018	May 01, 2018	Apr. 30, 2018
Revenue Recognition
Retained earnings	$ 272,300,000		$ 238,913,000
Revenue, Practical Expedient, Initial Application and Transition, Nondisclosure of Transaction Price Allocation to Remaining Performance Obligation [true false]	true
Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true false]	true
Revenue, Practical Expedient, Initial Application and Transition, Completed Contract, Same Reporting Period [true false]	true
ASU 2014-09 \| Effect of the Adoption of ASC Topic 606
Revenue Recognition
Retained earnings		$ (1,084,000)	$ (1,084,000)
Retained earnings, continuing operations		$ 1,063,000

The cumulative amount of the reporting entity's continuing operations undistributed earnings or deficit.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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No definition available.

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Indicates (true false) whether practical expedient was elected to recognize incremental cost of obtaining contract as expense when incurred if amortization period would have been one year or less.

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Indicates (true false) whether practical expedient was elected under initial application of retrospective method not to restate completed contract beginning and ending in same annual reporting period.

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Indicates (true false) whether practical expedient was elected not to disclose amount of transaction price allocated to remaining performance obligation and explanation of expected timing of revenue recognition for reporting period presented prior to date of initial application under retrospective method.

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