Income Taxes - Summary of Valuation Allowances Against U.S. Net Deferred Income Tax Assets (Detail) - USD ($) $ in Thousands	Apr. 28, 2024	Apr. 30, 2023	May 01, 2022	May 02, 2021
Valuation Allowance [Line Items]
Valuation allowance	$ 22,004	$ 18,675	$ 11,857	$ 11,674
U.S. Capital Loss Carry Forwards and Credits [Member]
Valuation Allowance [Line Items]
Valuation allowance	2,330	2,330
U.S. Federal and State [Member] | Deferred Income Tax Assets [Member]
Valuation Allowance [Line Items]
Valuation allowance	$ 19,674	$ 16,345