2019 Upholstery Fabrics Restructuring Plan - Summary of Restructuring Credit and Related Charges Associated with 2019 Upholstery Fabrics Restructuring Plan (Parenthetical) (Detail) - USD ($)		12 Months Ended
		May 03, 2020	Apr. 28, 2019
Restructuring and related charges	[1],[2]	$ (70,000)	$ 1,563,000
Cost of Sales [Member]
Restructuring and related charges			2,300,000
Selling, General and Administrative Expenses [Member]
Restructuring and related charges			40,000
Upholstery Fabrics [Member]
Restructuring credit		$ 70,000	825,000
Restructuring and related charges			1,600,000
Upholstery Fabrics [Member] | Cost of Sales [Member]
Restructuring and related charges			2,300,000
Upholstery Fabrics [Member] | Selling, General and Administrative Expenses [Member]
Restructuring and related charges			$ 40,000

[1] Of this total net charge of $1.6 million, a charge of $2.3 million, 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 fiscal 2019 Consolidated Statement of Net Income.

[2] The $1.6 million represent charges and credits that were associated our closed Anderson, SC upholstery fabrics facility and include $1.6 million for inventory markdowns, $784,000 for other operating costs, $661,000 for employee termination benefits, and $40,000 for the accelerated vesting of certain stock-based compensation agreements associated an employee, partially offset by a $1.5 million gain on the sale of property, plant, and equipment.