Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) - USD ($)		Aug. 01, 2021	May 02, 2021		Aug. 02, 2020
Segment Reporting Information [Line Items]
property, plant, and equipment		$ 43,930,000	$ 44,003,000	[1]	$ 42,051,000
Right of use assets		11,447,000	11,730,000	[1]	6,443,000
Operating Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	[2]	40,881,000	41,264,000		39,597,000
Right of use assets	[3]	4,058,000	4,278,000		832,000
Operating Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	[4]	2,080,000	1,925,000		1,634,000
Right of use assets	[5]	5,984,000	5,945,000		3,802,000
Operating Segments [Member] | United States [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment		27,600,000	28,400,000		27,000,000.0
Right of use assets		1,400,000	1,400,000		297,000
Operating Segments [Member] | United States [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment		1,100,000	1,100,000		1,200,000
Right of use assets		1,400,000	952,000		710,000
Operating Segments [Member] | Canada [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment		12,400,000	12,000,000.0		12,600,000
Right of use assets		355,000	400,000		535,000
Operating Segments [Member] | Haiti [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment		875,000	855,000
Right of use assets		2,300,000	2,400,000
Operating Segments [Member] | Haiti [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment		130,000
Operating Segments [Member] | China [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment		830,000	850,000		456,000
Right of use assets		4,600,000	5,000,000.0		3,100,000
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	[6]	969,000	814,000		820,000
Right of use assets	[7]	1,405,000	1,507,000		1,809,000
Unallocated Corporate [Member] | United States [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment		969,000	814,000		820,000
Right of use assets		$ 1,400,000	$ 1,500,000		$ 1,800,000

[1] Derived from audited financial statements.

[2] The $40.9 million as of August 1, 2021, represents property, plant, and equipment of $27.6 million, $12.4 million, and $875,000 located in the U.S., Canada, and Haiti, respectively. The $39.6 million as of August 2, 2020, represents property, plant, and equipment of $27.0 million and $12.6 million located in the U.S. and Canada, respectively.   The $41.3 million as of May 2, 2021, represents property, plant, and equipment of $28.4 million, $12.0 million, and $855,000 located in the U.S., Canada, and Haiti, respectively.

[3] The $4.1 million as of August 1, 2021, represents right of use assets of $2.3 million, $1.4 million, and $355,000 located in Haiti, the U.S., and Canada, respectively.  The $832,000 as of August 2, 2020, represents right of use assets of $535,000 and $297,000 located in Canada and the U.S., respectively.  The $4.3 million as of May 2, 2021, represents right of use assets of $2.4 million, $1.4 million, and $400,000 located in Haiti, the U.S., and Canada, respectively.  

[4] The $2.1 million as of August 1, 2021, represents property, plant, and equipment of $1.1 million, $830,000, and $130,000 located in the U.S., China, and Haiti, respectively. The $1.6 million as of August 2, 2020, represents property, plant, and equipment of $1.2 million and $456,000 located in the U.S. and China, respectively.   The $1.9 million as of May 2, 2021, represents property, plant, and equipment of $1.1 million and $850,000 located in the U.S. and China, respectively.

[5] The $6.0 million as of August 1, 2021, represents right of use assets of $4.6 million and $1.4 million located in China and the U.S., respectively.  The $3.8 million as of August 2, 2020, represents right of use assets of $3.1 million and $710,000 located in China and the U.S., respectively.  The $5.9 million as of May 2, 2021, represents right of use assets of $5.0 million and $952,000 located in China and the U.S., respectively.

[6] The $969,000, $820,000, and $814,000 as of August 1, 2021, August 2, 2020, and May 2, 2021, respectively, represent property, plant, and equipment associated with unallocated corporate departments and corporate departments shared by our mattress fabrics and upholstery fabrics segments. Property, plant, and equipment associated with our corporate departments reside in the U.S.

[7] The $1.4 million, $1.8 million, and $1.5 million as of August 1, 2021, August 2, 2020, and May 2, 2021, respectively, represent right of use assets located in the U.S.