Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) - USD ($)	Jul. 31, 2022	May 01, 2022		Aug. 01, 2021
Segment Reporting Information [Line Items]
property, plant, and equipment	$ 40,490,000	$ 41,702,000	[1]	$ 43,930,000
Right of use assets	14,556,000	15,577,000	[1]	11,447,000
Operating Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	37,354,000	38,731,000		41,311,000
Right of use assets	3,232,000	3,469,000		4,058,000
Operating Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	2,271,000	2,030,000		1,650,000
Right of use assets	7,520,000	8,124,000		5,984,000
Operating Segments [Member] | United States [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	24,700,000	25,600,000		28,000,000.0
Right of use assets	1,100,000	1,200,000		1,400,000
Operating Segments [Member] | United States [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	1,100,000	1,000,000.0		1,100,000
Right of use assets	1,600,000	1,800,000		1,400,000
Operating Segments [Member] | Canada [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	11,900,000	12,400,000		12,400,000
Right of use assets	228,000	291,000		355,000
Operating Segments [Member] | Haiti [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	718,000	757,000		875,000
Right of use assets	1,900,000	2,000,000.0		2,300,000
Operating Segments [Member] | Haiti [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	988,000	756,000		130,000
Right of use assets	2,500,000	2,600,000
Operating Segments [Member] | China [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	232,000	255,000		400,000
Right of use assets	3,400,000	3,700,000		4,600,000
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	865,000	941,000		969,000
Right of use assets	3,804,000	3,984,000		1,405,000
Unallocated Corporate [Member] | United States [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	865,000	941,000		969,000
Right of use assets	$ 3,800,000	$ 4,000,000.0		$ 1,400,000

[1] Derived from audited financial statements.