Customer Financing (Details)	12 Months Ended
	Apr. 27, 2024 USD ($) contract	Apr. 29, 2023 USD ($)	Apr. 30, 2022 USD ($)
Customer Financing [Line Items]
Maximum credit financed for equipment purchases for any one customer	$ 2,000,000
Number of customer financing contracts | contract	2
Deferred purchase price receivable transferred	$ 15,400,000
Financing contracts sold	281,076,000	$ 261,853,000	$ 314,732,000
Loss on sale of financing contracts	(11,010,000)	(4,082,000)	(18,379,000)
Proceeds from receivables sold	291,621,000	302,851,000	$ 426,188,000
Unamortized discount	3,097,000	0
Cash and cash equivalents	114,462,000	159,669,000
Current receivables of finance contracts not yet sold	74,430,000	77,646,000
Finance contracts receivable sold and outstanding	$ 581,729,000
Maximum bad debt write-offs (percentage)	1.00%
Fifth Third Bank
Customer Financing [Line Items]
Capacity under agreement		525
Mitsubishi UFJ Financial Group
Customer Financing [Line Items]
Capacity under agreement	$ 575,000
Unsettled Financing Arrangements
Customer Financing [Line Items]
Cash and cash equivalents	$ 33,813,000	$ 33,072,000
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	$ 575,000,000
Fifth Third Bank
Customer Financing [Line Items]
Percentage of principal amount of financing contracts held as collateral (at least)	15.00%