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Income Taxes - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
Income Taxes - Narrative (Details) - USD ($)	Apr. 27, 2024	Apr. 27, 2024	Apr. 29, 2023	Apr. 30, 2022	Apr. 30, 2021
Income Tax Contingency [Line Items]
Valuation allowance	$ 23,258,000	$ 23,258,000	$ 9,306,000	$ 5,170,000	$ 3,706,000
Increase in valuation allowance	7,300,000	13,952,000	4,136,000	$ 1,464,000
Research and development credits	15,990,000	15,990,000	9,401,000
Foreign tax credit carryover	0	0
Undistributed foreign earnings	25,700,000	25,700,000
Potential benefits	4,600,000	4,600,000	$ 2,900,000
Research Tax Credit Carryforward
Income Tax Contingency [Line Items]
Increase in valuation allowance		6,700,000
Domestic Tax Authority
Income Tax Contingency [Line Items]
NOL carryforwards	18,700,000	18,700,000
Research and development credits	12,600,000	12,600,000
State and Local Jurisdiction
Income Tax Contingency [Line Items]
NOL carryforwards	7,400,000	7,400,000
Research and development credits	$ 9,600,000	$ 9,600,000