Segment Information - Balance Sheet Information by Operating Segments (Detail) - USD ($)		Jul. 30, 2023	Apr. 30, 2023		Jul. 31, 2022
Segment Reporting Information [Line Items]
Accounts receivable		$ 22,612,000	$ 24,778,000	[1]	$ 24,812,000
Inventory		43,817,000	45,080,000	[1]	63,749,000
Cash and cash equivalents		16,812,000	20,964,000	[1]	18,874,000
Short-term investments - rabbi trust		791,000	1,404,000	[1]
Short-term note receivable		252,000	219,000	[1]
Current income taxes receivable		202,000			798,000
Other current assets		3,578,000	3,071,000	[1]	3,840,000
Long-term note receivable		1,661,000	1,726,000	[1]
Deferred income taxes		476,000	480,000	[1]	546,000
Property, plant and equipment		34,929,000	36,111,000	[1]	40,490,000
Right of use assets		7,466,000	8,191,000	[1]	14,556,000
Intangible assets		2,158,000	2,252,000	[1]	2,534,000
Long-term investments - rabbi trust		7,204,000	7,067,000	[1]	9,567,000
Other assets		944,000	840,000	[1]	724,000
Total assets		142,902,000	152,183,000	[1]	180,490,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total assets		105,088,000	110,204,000		138,938,000
Operating Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Accounts receivable		11,058,000	12,396,000		12,382,000
Inventory		24,579,000	25,674,000		36,471,000
Property, plant and equipment	[2]	32,792,000	33,749,000		37,354,000
Right of use assets	[3]	2,139,000	2,308,000		3,232,000
Total assets		70,568,000	74,127,000		89,439,000
Operating Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Accounts receivable		11,554,000	12,382,000		12,430,000
Inventory		19,238,000	19,406,000		27,278,000
Property, plant and equipment	[4]	1,491,000	1,671,000		2,271,000
Right of use assets	[5]	2,237,000	2,618,000		7,520,000
Total assets		34,520,000	36,077,000		49,499,000
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Cash and cash equivalents		16,812,000	20,964,000		18,874,000
Short-term investments - rabbi trust		791,000	1,404,000
Short-term note receivable		252,000	219,000
Current income taxes receivable		202,000			798,000
Other current assets		3,578,000	3,071,000		3,840,000
Long-term note receivable		1,661,000	1,726,000
Deferred income taxes		476,000	480,000		546,000
Property, plant and equipment	[6]	646,000	691,000		865,000
Right of use assets	[7]	3,090,000	3,265,000		3,804,000
Intangible assets		2,158,000	2,252,000		2,534,000
Long-term investments - rabbi trust		7,204,000	7,067,000		9,567,000
Other assets		$ 944,000	$ 840,000		$ 724,000

[1] Derived from audited consolidated financial statements.

[2] The $32.8 million as of July 30, 2023, represents property, plant, and equipment of $22.1 million, $10.1 million, and $594,000 located in the U.S., Canada, and Haiti, respectively. The $37.4 million as of July 31, 2022, represents property, plant, and equipment of $24.7 million, $11.9 million, and $718,000 located in the U.S., Canada, and Haiti, respectively. The $33.7 million as of April 30, 2023, represents property, plant, and equipment of $22.7 million, $10.4 million, and $608,000 located in the U.S., Canada, and Haiti, respectively.

[3] The $2.1 million as of July 30, 2023, represents right of use assets of $1.4 million and $720,000 located in Haiti and Canada, respectively. The $3.2 million as of July 31, 2022, represents right of use assets of $1.9 million, $1.1 million, and $228,000 located in Haiti, the U.S., and Canada, respectively. The $2.3 million as of April 30, 2023, represents right of use assets of $1.5 million and $776,000 located in Haiti and Canada, respectively.

[4] The $1.5 million as of July 30, 2023, represents property, plant, and equipment of $1.0 million, $327,000, and $159,000 located in the U.S., Haiti, and China, respectively. The $2.3 million as of July 31, 2022, represents property, plant, and equipment of $1.1 million, $988,000, and $232,000 located in the U.S., Haiti, and China, respectively. The $1.7 million as of April 30, 2023, represents property, plant, and equipment of $974,000, $592,000, and $105,000 located in the U.S., Haiti, and China, respectively.

[5] The $2.2 million as of July 30, 2023, represents right of use assets of $1.2 million and $977,000 located in China and the U.S., respectively. The $7.5 million as of July 31, 2022, represents right of use assets of $3.4 million, $2.5 million, and $1.6 million located in China, Haiti, and the U.S., respectively. The $2.6 million as of April 30, 2023, represents right of use assets of $1.5 million and $1.1 million located in China and the U.S., respectively.

[6] The $646,000, $865,000, and $691,000 as of July 30, 2023, July 31, 2022, and April 30, 2023, respectively, represent property, plant, and equipment associated with unallocated corporate department 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 $3.1 million, $3.8 million, and $3.3 million as of July 30, 2023, July 31, 2022, and April 30, 2023, respectively, represent right of use assets located in the U.S.