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Income Taxes - Summary of Valuation Allowances Against Net Deferred Income Tax Assets (Detail) - USD ($) $ in Thousands	Jan. 26, 2025	Apr. 28, 2024	Jan. 28, 2024
Valuation Allowance [Line Items]
Valuation allowance	$ 26,292	$ 22,004	$ 21,492
U.S. Capital Loss Carry Forwards [Member]
Valuation Allowance [Line Items]
Valuation allowance	2,330	2,330	2,330
U.S. Federal and State [Member] | Deferred Income Tax Assets [Member]
Valuation Allowance [Line Items]
Valuation allowance	$ 23,962	$ 19,674	$ 19,162

X

- 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
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Details

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