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General and Summary of Significant Accounting Policies - Summary of Foreign Currency Exchange (Losses) Gains by Geographic Area (Detail) - USD ($) $ in Thousands | 12 Months Ended
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May 02, 2021 | May 03, 2020 | Apr. 28, 2019
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | $ (1,411) | $ (96) | $ (62)
China [Member] |  |  |
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | (1,389) | 42 |
Canada [Member] |  |  |
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) | $ (22) | $ (138) | 2
Europe [Member] |  |  |
Foreign Currency Exchange Gain And Loss [Line Items] |  |  |
Foreign currency exchange gains (losses) |  |  | $ (64)

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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 http://asc.fasb.org/extlink&oid=109240200&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 http://asc.fasb.org/extlink&oid=121605123&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 http://asc.fasb.org/extlink&oid=120253306&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 http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 + Details
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