Income Taxes - Summary of Taxes Paid (Refunded) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 01, 2021	Aug. 02, 2020
Income Taxes [Line Items]
United States Federal - Alternative Minimum Tax (AMT) credit refunds		$ 1,500
Total income tax payments, net	$ 1,688	9
Domestic Tax Authority [Member] | United States [Member]
Income Taxes [Line Items]
United States Federal - Alternative Minimum Tax (AMT) credit refunds		(745)
Foreign Tax Authority [Member] | China [Member]
Income Taxes [Line Items]
Total income tax payments, net	1,408	349
Foreign Tax Authority [Member] | Canada [Member]
Income Taxes [Line Items]
Total income tax payments, net	$ 280	$ 405