Income Taxes - Summary of Income Taxes Paid (Refunded) (Detail) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Nov. 01, 2020	May 01, 2022	May 02, 2021	May 03, 2020
Income Taxes [Line Items]
United States Federal - Alternative Minimum Tax (AMT) credit refunds		$ 1,500
Total income tax payments, net			$ 3,100	$ 2,998	$ 4,995
Domestic Tax Authority | United States [Member]
Income Taxes [Line Items]
United States Federal - Alternative Minimum Tax (AMT) credit refunds	[1]			(1,510)
United States Transition Tax Payment			266	226
Foreign Tax Authority | China [Member]
Income Taxes [Line Items]
Total income tax payments, net			2,036	2,076	2,559
China - Withholding Taxes Associated with Earnings and Profits Distribution to U.S. Parent			487	798	838
Foreign Tax Authority | Canada [Member]
Income Taxes [Line Items]
Total income tax payments, net			$ 311	$ 1,408	$ 1,598

[1] In accordance with the provisions of the TCJA, we elected to treat our prior AMT credit carryforward balance of $1.5 million as refundable. We received refunds totaling $1.5 million in two separate installments totaling $746,000 and $764,000 during the first and second quarters of fiscal 2021, respectively.