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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. 30, 2023 | May 01, 2022 | May 02, 2021
Income Tax Disclosure [Abstract] |  |  |  |
beginning balance |  | $ 11,857 | $ 11,674 | $ 3,148
change in judgement of beginning of year U.S. valuation allowance | [1] |  |  | 6,964
change in valuation allowance associated with current year earnings |  | 7,252 | 1,640 | 1,004
change in estimate during current year | [2] | (434) | (1,457) | 558
ending balance |  | $ 18,675 | $ 11,857 | $ 11,674
[1] | Refer to the above "Assessment" subsection within the section titled Deferred Income Taxes – Valuation Allowance for further details regarding our assessment and conclusions reached for providing a full valuation allowance against our U.S net deferred income tax assets during the first quarter of fiscal 2021.
[2] | 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 the expiration of statute of limitations, (iv) expiration of certain U.S. state loss carryforwards, and (v) other immaterial items.

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- Definition Change in judgement of US valuation allowance. + References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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