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Fair Value - Narrative (Detail) - USD ($)
Oct. 29, 2023
Apr. 30, 2023
Oct. 30, 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]      
Investments (Rabbi Trust) - available for sale $ 7,900,000 $ 8,500,000 $ 9,800,000
Long-term investments (Rabbi Trust) - available for sale 7,000,000 7,100,000 7,600,000
Short-term investments (Rabbi Trust) - available for sale 937,000 1,404,000 [1] 2,237,000
Accumulated unrealized gain (loss) on investments $ (6,000) $ 19,000 $ (21,000)
Investment, Type [Extensible Enumeration] Investments [Member] Investments [Member] Investments [Member]
[1] Derived from audited consolidated financial statements.