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Fair Value - Narrative (Detail) - USD ($)
Jan. 28, 2024
Apr. 30, 2023
Jan. 29, 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]      
Investments (Rabbi Trust) - available for sale $ 8,000,000 $ 8,500,000 $ 10,100,000
Long-term investments (Rabbi Trust) - available for sale 7,100,000 7,100,000 7,700,000
Short-term investments (Rabbi Trust) - available for sale 937,000 1,404,000 [1] 2,420,000
Accumulated unrealized gain (loss) on investments $ 88,000 $ 19,000 $ 21,000
Investment, Type [Extensible Enumeration] us-gaap:InvestmentsMember us-gaap:InvestmentsMember us-gaap:InvestmentsMember
[1] Derived from audited consolidated financial statements.