Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Jan. 26, 2019	May 02, 2020	Apr. 27, 2019
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		$ 138
Reconciliation of Changes in Unrecognized Tax Benefits
Unrecognized tax benefits, beginning balance	$ 3,178	578	$ 3,178
Gross increases related to prior period tax positions		17	13
Gross decreases related to prior period tax positions		2	18
Gross increases related to current period tax positions		148	146
Lapse of statute of limitations	$ (2,775)	(159)	(2,741)
Unrecognized tax benefits, ending balance		$ 582	$ 578

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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