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Income Taxes - Summary of Change in Valuation Allowances Against U.S. Net Deferred Income Tax Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2023
May 01, 2022
May 02, 2021
Income Tax Disclosure [Abstract]      
beginning balance $ 11,857 $ 11,674 $ 3,148
change in judgement of beginning of year U.S. valuation allowance [1]     6,964
change in valuation allowance associated with current year earnings 7,252 1,640 1,004
change in estimate during current year [2] (434) (1,457) 558
ending balance $ 18,675 $ 11,857 $ 11,674
[1] Refer to the above "Assessment" subsection within the section titled Deferred Income Taxes – Valuation Allowance for further details regarding our assessment and conclusions reached for providing a full valuation allowance against our U.S net deferred income tax assets during the first quarter of fiscal 2021.
[2] Amounts represent changes in our U.S. net deferred income tax asset balances during the current year that pertain to (i) income tax provision to return adjustments, (ii) changes in estimates of our U.S. effective income tax rate that pertain to U.S. state income tax rates and apportionment percentages, (iii) recognition of an uncertain income tax position due to the expiration of statute of limitations, (iv) expiration of certain U.S. state loss carryforwards, and (v) other immaterial items.