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Income Taxes - Deferred Income Taxes - Narrative (Detail) - USD ($)	12 Months Ended
	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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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

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards.

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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

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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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

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