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Income Taxes - Deferred Income Taxes - Narrative (Detail) - USD ($) | 12 Months Ended |
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Apr. 28, 2024 | Apr. 30, 2023
Income Taxes [Line Items] |  |
foreign income tax credits - U.S. | $ 783,000 | $ 783,000
U.S. foreign income tax credits, expiration period | 10 years |
U.S. Federal Tax Authorities [Member] |  |
Income Taxes [Line Items] |  |
Operating Loss Carryforwards | $ 69,600,000 |
Operating loss carryforwards, related future tax benefits | 14,600,000 |
U.S. State and Local Jurisdiction [Member] |  |
Income Taxes [Line Items] |  |
Operating Loss Carryforwards | 31,700,000 |
Operating loss carryforwards, related future tax benefits | $ 1,300,000 |
U.S. State and Local Jurisdiction [Member] | Earliest Tax Year [Member] |  |
Income Taxes [Line Items] |  |
Operating Loss Carry forwards Expiration Year | 2025 |
U.S. State and Local Jurisdiction [Member] | Latest Tax Year [Member] |  |
Income Taxes [Line Items] |  |
Operating Loss Carry forwards Expiration Year | 2045 |
U.S. Foreign [Member] | Earliest Tax Year [Member] |  |
Income Taxes [Line Items] |  |
Operating Loss Carry forwards Expiration Year | 2026 |
U.S. Foreign [Member] | Latest Tax Year [Member] |  |
Income Taxes [Line Items] |  |
Operating Loss Carry forwards Expiration Year | 2028 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
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