Segment Information - Balance Sheet Information by Operating Segments (Detail) - USD ($) $ in Thousands		Apr. 28, 2024		Apr. 30, 2023
Segment Reporting Information [Line Items]
Accounts receivable		$ 21,138		$ 24,778
inventory		44,843		45,080
property, plant, and equipment		33,182		36,111
right of use assets		6,203		8,191
total assets		132,054		152,183
cash and cash equivalents		10,012		20,964
short-term investments - rabbi trust		903		1,404
short-term note receivable		264		219
current income taxes receivable		350
other current assets		3,371		3,071
long-term note receivable		1,462		1,726
deferred income taxes		518		480
intangible assets		1,876		2,252
long-term investments - rabbi trust		7,102		7,067
other assets		830		840
Business Segments [Member]
Segment Reporting Information [Line Items]
total assets		102,157		110,204
Business Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Accounts receivable		10,003		12,396
inventory		27,671		25,674
property, plant, and equipment		31,472	[1]	33,749	[2]
right of use assets		1,627	[3]	2,308	[4]
total assets		70,773		74,127
Business Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Accounts receivable		11,135		12,382
inventory		17,172		19,406
property, plant, and equipment		1,125	[5]	1,671	[6]
right of use assets		1,952	[7]	2,618	[8]
total assets		31,384		36,077
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
property, plant, and equipment	[9]	585		691
right of use assets	[10]	2,624		3,265
cash and cash equivalents		10,012		20,964
short-term investments - rabbi trust		903		1,404
short-term note receivable		264		219
current income taxes receivable		350
other current assets		3,371		3,071
long-term note receivable		1,462		1,726
deferred income taxes		518		480
intangible assets		1,876		2,252
long-term investments - rabbi trust		7,102		7,067
other assets		$ 830		$ 840

[1] The $31.5 million as of April 28, 2024, represents property, plant, and equipment of $21.5 million, $9.4 million, and $555,000 located in the U.S., Canada, and Haiti, respectively.

[2] 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 $1.6 million as of April 28, 2024, represents right of use assets of $1.1 million and $545,000 located in Haiti and Canada, respectively.

[4] 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.

[5] The $1.1 million as of April 28, 2024, represents property, plant, and equipment of $1.0 million and $120,000 located in the U.S. and China, respectively.

[6] 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.

[7] The $2.0 million as of April 28, 2024, represents right of use assets of $1.3 million and $709,000 located in the U.S. and China, respectively.

[8] 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.

[9] The $585,000 as of April 28, 2024, and $691,000 as of April 30, 2023, represent property, plant, and equipment associated with unallocated corporate departments and corporate departments shared by both the mattress fabrics and upholstery fabrics segments located in the U.S.

[10] The $2.6 million as of April 28, 2024, and $3.3 million as of April 30, 2023, represent right of use assets associated with unallocated corporate departments and corporate departments shared by both the mattress fabrics and upholstery fabrics segments located in the U.S.