Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jan. 23, 2021	Apr. 26, 2020	Apr. 25, 2020
Payables and Accruals [Abstract]
Payroll and other compensation	$ 48,403		$ 34,980
Accrued product warranty, current portion	14,322		14,264
Customer deposits, included in accrued expenses and other current liabilities	162,576	$ 40,700	40,721
Deferred revenues, included in accrued expenses and other current liabilities	93,914	$ 17,100	17,086
Other current liabilities	68,828		48,231
Accrued expenses and other current liabilities	$ 388,043		$ 155,282