Customer Financing (Details)	12 Months Ended
	Apr. 29, 2023 USD ($) contract	Apr. 30, 2022 USD ($)	Apr. 24, 2021 USD ($)
Customer Financing [Line Items]
Maximum credit financed for equipment purchases for any one customer	$ 1,000,000
Number of customer financing contracts | contract	2
Financing contracts sold	$ 261,853,000	$ 314,732,000	$ 369,497,000
Loss on sale of financing contracts	(4,082,000)	(18,379,000)	(2,048,000)
Proceeds from receivables sold	302,851,000	426,188,000	$ 401,535,000
Cash and cash equivalents	159,669,000	142,014,000
Current receivables of finance contracts not yet sold	77,646,000	58,190,000
Finance contracts receivable sold and outstanding	$ 555,763,000
Maximum bad debt write-offs (percentage)	1.00%
Unsettled Financing Arrangements
Customer Financing [Line Items]
Cash and cash equivalents	$ 33,072,000	$ 39,106,000
The Bank of Tokyo-Mitsubishi UFJ, Ltd.
Customer Financing [Line Items]
Percentage of principal amount of financing contracts held as collateral (at least)	15.00%
Capacity under agreement	$ 525,000,000
Fifth Third Bank
Customer Financing [Line Items]
Percentage of principal amount of financing contracts held as collateral (at least)	15.00%
Capacity under agreement	$ 100,000,000