Customer Financing (Detail)	3 Months Ended			9 Months Ended
	Jan. 27, 2024 USD ($)	Jul. 29, 2023 USD ($)	Jan. 28, 2023 USD ($)	Jan. 27, 2024 USD ($) financingAgreement	Jan. 28, 2023 USD ($)	Oct. 28, 2023 USD ($)	Apr. 29, 2023 USD ($)
Customer Financing [Line Items]
Maximum credit financed for equipment purchases for any one customer	$ 2,000,000			$ 2,000,000
Number of customer financing contracts | financingAgreement				2
Deferred Purchase Price Receivable Transferred		$ 15,400,000
Financing contracts sold				$ 197,712,000	$ 205,140,000
(Loss) gain on sale of financing contracts	(3,110,000)		$ (3,254,000)	(10,270,000)	(7,900,000)
Proceeds from Receivables sold				211,827,000	238,091,000
Cash and cash equivalents	123,998,000			123,998,000			$ 159,669,000
Current receivables of finance contracts not yet sold	54,177,000			54,177,000			77,646,000
Finance contracts receivable sold and outstanding	563,242,000			$ 563,242,000
Bad debt write-offs, percentage (less than)				1.00%
Unsettled Financing Arrangements
Customer Financing [Line Items]
Cash and cash equivalents	27,771,000			$ 27,771,000			$ 33,072,000
Customer Finance Contracts
Customer Financing [Line Items]
(Loss) gain on sale of financing contracts	9,117,000		$ 2,417,000	$ (3,763,000)	$ (5,051,000)
MUFG
Customer Financing [Line Items]
Percentage of principal amount of financing contracts held as collateral (at least)				15.00%
Capacity under agreement	$ 575,000,000			$ 575,000,000		$ 575,000
Fifth Third Bank
Customer Financing [Line Items]
Percentage of principal amount of financing contracts held as collateral (at least)				15.00%
Capacity under agreement		$ 525,000,000