Segment Information - Statement of Operations for Operating Segments (Parenthetical) (Detail) - USD ($)		3 Months Ended						12 Months Ended
		May 03, 2020	Feb. 02, 2020	Aug. 04, 2019	Jan. 27, 2019	Oct. 28, 2018	Jul. 29, 2018	May 03, 2020		Apr. 28, 2019
Segment Reporting Information [Line Items]
Other non-recurring charges	[1],[2]									$ 678,000
Restructuring related charge for operating costs	[3],[4]							$ (70,000)		1,563,000
Gain on sale of property, plant, and equipment								238,000		1,452,000
restructuring credit			$ 35,000	$ 35,000	$ 214,000	$ 1,061,000	$ (451,000)	70,000		825,000
Asset impairments		$ 13,712,000						13,712,000	[5]
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								(70,000)		661,000
Inventory markdowns										1,564,000
Other operating costs associated with a closed facility										824,000
Restructuring related charge for operating costs	[6],[7]							(70,000)		1,563,000
Gain on sale of property, plant, and equipment										1,486,000
Asset impairments								$ 2,200,000
Cost of Sales [Member]
Segment Reporting Information [Line Items]
Restructuring Related Charges										2,300,000
Cost of Sales [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Restructuring Related Charges										2,300,000
Selling, General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Restructuring 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 Related Charges										40,000
Operating Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Other non-recurring charges	[1]									159,000
Operating Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Employee termination benefits										661,000
Restructuring Related Charges	[8]									2,349,000
Restructuring related charge for operating costs										1,600,000
Operating Segments [Member] | Cost of Sales [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Employee termination benefits										159,000
Operating Segments [Member] | Cost of Sales [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Restructuring Related Charges										2,300,000
Inventory markdowns										1,600,000
Other operating costs associated with a closed facility										784,000
Operating Segments [Member] | Selling, General and Administrative Expenses [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Employee termination benefits										89,000
Other non-recurring charges	[2]									(518,000)
Operating Segments [Member] | Selling, General and Administrative Expenses [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Restructuring Related Charges	[9]									(40,000)
Unallocated Corporate [Member] | Selling, General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Other non-recurring charges										$ 429,000

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

[2] The $518 represents a non-recurring charge of $429 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 includes $89 for employee termination benefits and operational reorganizational costs associated with our mattress fabrics segment.

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

[4] 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 for other operating costs, $661 for employee termination benefits, and $40 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.

[5] During fiscal 2020, we incurred asset impairment charges totaling $13.7 million, of which $13.6 million and $143,000 were associated with goodwill 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] Of the total net charge, 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.

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

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

[9] The $40 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.