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Income Taxes - Summary of Change in Valuation Allowances Against U.S. Net Deferred Income Tax Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 28, 2024 | Apr. 30, 2023 | May 01, 2022
Income Tax Disclosure [Abstract] |  |  |  |
beginning balance |  | $ 18,675 | $ 11,857 | $ 11,674
change in valuation allowance associated with current year earnings |  | 3,318 | 7,252 | 1,640
change in estimate during current year | [1] | 11 | (434) | (1,457)
ending balance |  | $ 22,004 | $ 18,675 | $ 11,857
[1] | Amounts represent changes in our U.S.net deferred income tax asset balances during the current year that pertain to (i) income tax provision to return adjustments; (ii) changes in estimates of our U.S. effective income tax rate that pertain to U.S. state income tax rates and apportionment percentages, (iii) recognition of an uncertain income tax position due to expiration of statute of limitations; (iv) expiration of certain U.S. state loss carryforwards; and (v) other immaterial items.

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- Definition Valuation allowance change associated with current year earnings. + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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