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Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) - USD ($)	Apr. 30, 2023	May 01, 2022
Segment Reporting Information [Line Items]
property, plant, and equipment	$ 36,111,000	$ 41,702,000
Right of use assets	8,191,000	15,577,000
Business Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	33,749,000	38,731,000
Right of use assets	2,308,000	3,469,000
Business Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	1,671,000	2,030,000
Right of use assets	2,618,000	8,124,000
Business Segments [Member] | United States [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	22,700,000	25,600,000
Right of use assets		1,200,000
Business Segments [Member] | United States [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	974,000	1,000,000.0
Right of use assets	1,100,000	1,800,000
Business Segments [Member] | Canada [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	10,400,000	12,400,000
Right of use assets	776,000	291,000
Business Segments [Member] | Haiti [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	608,000	757,000
Right of use assets	1,500,000	2,000,000.0
Business Segments [Member] | Haiti [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	592,000	756,000
Right of use assets		2,600,000
Business Segments [Member] | China [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	105,000	255,000
Right of use assets	1,500,000	3,700,000
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	691,000	941,000
Right of use assets	3,265,000	3,984,000
Unallocated Corporate [Member] | United States [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	691,000	941,000
Right of use assets	$ 3,300,000	$ 4,000,000.0

X

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

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X

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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