2019 Upholstery Fabrics Restructuring Plan - Summary of Restructuring Credit and Related Charges Associated with 2019 Upholstery Fabrics Restructuring Plan (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 02, 2021	May 03, 2020	Apr. 28, 2019
Restructuring Cost and Reserve [Line Items]
gain on sale of property, plant, and equipment		$ (57)	$ (238)	$ (1,452)
Upholstery Fabrics [Member]
Restructuring Cost and Reserve [Line Items]
Inventory markdowns				1,564
Other operating costs associated with a closed facility				824
Employee termination benefits			(70)	661
gain on sale of property, plant, and equipment				(1,486)
Restructuring credit and restructuring related charges	[1],[2]		$ (70)	$ 1,563

[1] Of the total net charge of $1.6 million, a $2.3 million charge, a charge of $40,000, and a credit of $825,000 were recorded in cost of sales, selling, general and administrative expenses, and restructuring credit, respectively, in the accompanying fiscal 2019 Consolidated Statement of Net Income.

[2] The $70,000 credit was recorded to restructuring credit in the accompanying fiscal 2020 Consolidated Statement of Net Loss.