Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) - USD ($)	Oct. 30, 2022	May 01, 2022		Oct. 31, 2021
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 38,832,000	$ 41,702,000	[1]	$ 43,265,000
Right of use assets	11,609,000	15,577,000	[1]	13,649,000
Operating Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	35,853,000	38,731,000		40,673,000
Right of use assets	2,087,000	3,469,000		3,838,000
Operating Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	2,150,000	2,030,000		1,680,000
Right of use assets	5,898,000	8,124,000		5,472,000
Operating Segments [Member] | United States [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	23,800,000	25,600,000		27,300,000
Right of use assets	164,000	1,200,000		1,300,000
Operating Segments [Member] | United States [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	1,000,000.0	1,000,000.0		1,100,000
Right of use assets	1,400,000	1,800,000		1,200,000
Operating Segments [Member] | Canada [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	11,400,000	12,400,000		12,600,000
Right of use assets	167,000	291,000		309,000
Operating Segments [Member] | Haiti [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	679,000	757,000		836,000
Right of use assets	1,800,000	2,000,000.0		2,200,000
Operating Segments [Member] | Haiti [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	1,000,000.0	756,000		242,000
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	137,000	255,000		368,000
Right of use assets	2,000,000.0	3,700,000		4,300,000
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	829,000	941,000		912,000
Right of use assets	3,624,000	3,984,000		4,339,000
Unallocated Corporate [Member] | United States [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	829,000	941,000		912,000
Right of use assets	$ 3,600,000	$ 4,000,000.0		$ 4,300,000

[1] Derived from audited financial statements.