Segment Information - Statement of Operations for Operating Segments (Parenthetical) (Detail) - USD ($)			12 Months Ended
		Feb. 01, 2021	May 02, 2021	May 03, 2020	Apr. 28, 2019
Segment Reporting Information [Line Items]
restructuring and related charges	[1],[2]			$ (70,000)	$ 1,563,000
Other non-recurring charges	[3],[4]				678,000
Gain on sale of property, plant, and equipment			$ 57,000	238,000	1,452,000
restructuring credit				70,000	825,000
Asset impairments	[5]			13,712,000
CIH [Member]
Segment Reporting Information [Line Items]
Acquisition of additional ownership percentage		50.00%
Payments to acquire additional ownership interest		$ 954,000
Continuing Operation [Member]
Segment Reporting Information [Line Items]
Asset impairments				13,600,000
Goodwill impairment charges				13,569,000
Trade Names [Member]
Segment Reporting Information [Line Items]
Asset impairments				143,000
Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Asset impairments				11,500,000
Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Employee termination benefits and other operational reorganization costs				(70,000)	661,000
restructuring and related charges					1,600,000
Inventory markdowns					1,564,000
Restructuring related charge for other operating costs					824,000
Gain on sale of property, plant, and equipment					1,486,000
Asset impairments				2,200,000
Mattress and Upholstery Fabric [Member] | Continuing Operation [Member]
Segment Reporting Information [Line Items]
Goodwill impairment charges				$ 13,600,000
Cost of Sales [Member]
Segment Reporting Information [Line Items]
restructuring and related charges					2,300,000
Cost of Sales [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
restructuring and related charges					2,300,000
Selling, General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
restructuring and related charges					40,000
Other non-recurring charges					518,000
Selling, General and Administrative Expenses [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
restructuring and related charges					40,000
Operating Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Other non-recurring charges	[3]				159,000
Operating Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Employee termination benefits and other operational reorganization costs					661,000
restructuring and related charges	[6]				2,349,000
Operating Segments [Member] | Upholstery Fabrics [Member] | Inventory Mark Downs [Member]
Segment Reporting Information [Line Items]
restructuring and related charges					1,600,000
Operating Segments [Member] | Cost of Sales [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Employee termination benefits and other operational reorganization costs					159,000
Operating Segments [Member] | Cost of Sales [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
restructuring and related charges					2,300,000
Inventory markdowns					1,600,000
Restructuring related charge for other operating costs					784,000
Operating Segments [Member] | Selling, General and Administrative Expenses [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Employee termination benefits and other operational reorganization costs					89,000
Other non-recurring charges	[4]				(518,000)
Operating Segments [Member] | Selling, General and Administrative Expenses [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
restructuring and related charges	[7]				(40,000)
Unallocated Corporate [Member] | Selling, General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Other non-recurring charges					$ 429,000

[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.

[3] The $159,000 represents employee termination benefits and other operational reorganization costs associated with our mattress fabrics segment.

[4] The $518,000 represents a non-recurring charge of $429,000 for the accelerated vesting of certain stock-based compensation agreements associated with a senior executive and was recorded in unallocated corporate expenses. Additionally, the $518,000 includes $89,000 for employee termination benefits and operational reorganizational costs associated with our mattress fabrics segment.

[5] During fiscal 2020, we incurred asset impairment charges totaling $13.7 million, of which $13.6 million and $143,000 pertained to goodwill associated with our mattress and upholstery fabric segments and a tradename associated Read, respectively. Of this $13.7 million, $11.5 million and $2.2 million pertained to the mattress fabrics segment and upholstery fabrics segment, respectively.

[6] The $2.3 million represents a restructuring related charge of $1.6 million for inventory markdowns and $784,000 for other operating costs associated with our closed Anderson, SC upholstery fabrics facility.

[7] The $40,000 represents a restructuring related charge for the accelerated vesting for certain stock-based compensation agreements associated with an employee that was located at our closed Anderson, SC upholstery fabrics facility.