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General and Summary of Significant Accounting Policies - Summary of Foreign Currency Exchange Gains (Losses) by Geographic Area (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2023 | May 01, 2022 | May 02, 2021
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | $ 500 | $ (132) | $ (1,411)
China [Member] |  |  |
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | 588 | (104) | (1,389)
Canada [Member] |  |  |
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | $ (88) | $ (28) | $ (22)

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=125521441&loc=d3e30690-110894 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 35 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123602790&loc=d3e30226-110892 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 10 -Section 45 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=126980362&loc=d3e28228-110885 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124440516&loc=d3e30840-110895 + Details
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