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Income Taxes - Summary of Valuation Allowances Against Net Deferred Income Tax Assets (Detail) - USD ($)
$ in Thousands
Jan. 28, 2024
Apr. 30, 2023
Jan. 29, 2023
Valuation Allowance [Line Items]      
Valuation allowance $ 21,492 $ 18,675 $ 18,071
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 $ 19,162 $ 16,345 $ 15,741