Segment Information - Statement of Operations for Operating Segments (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 30, 2022	Oct. 31, 2021	Oct. 30, 2022	Oct. 31, 2021
Segment Reporting Information [Line Items]
net sales	$ 58,381,000	$ 74,561,000	$ 120,985,000	$ 157,608,000
gross (loss) profit	(2,213,000)	10,727,000	1,914,000	23,226,000
selling, general, and administrative expenses	9,103,000	9,087,000	17,968,000	18,268,000
(loss) income from operations	(11,931,000)	1,640,000	(16,669,000)	4,958,000
Restructuring expense	(615,000)		(615,000)
restructuring related charge	(98,000)		(98,000)
interest income	79,000	59,000	96,000	132,000
Other income (expense)	829,000	(404,000)	747,000	(640,000)
(Loss) income before income taxes	(11,023,000)	1,295,000	(15,826,000)	4,450,000
Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
net sales	26,230,000	40,883,000	55,602,000	83,941,000
gross (loss) profit	(6,057,000)	6,146,000	(6,093,000)	12,941,000
selling, general, and administrative expenses	2,945,000	3,007,000	5,829,000	6,191,000
(loss) income from operations	(9,002,000)	3,139,000	(11,922,000)	6,750,000
Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
net sales	32,151,000	33,678,000	65,383,000	73,667,000
gross (loss) profit	3,942,000	4,581,000	8,105,000	10,285,000
selling, general, and administrative expenses	3,680,000	3,553,000	7,302,000	6,990,000
(loss) income from operations	262,000	1,028,000	803,000	3,295,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
gross (loss) profit	(2,115,000)	10,727,000	2,012,000	23,226,000
(loss) income from operations	(11,218,000)	1,640,000	(15,956,000)	4,958,000
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
selling, general, and administrative expenses	2,478,000	2,527,000	4,837,000	5,087,000
(loss) income from operations	$ (2,478,000)	$ (2,527,000)	$ (4,837,000)	$ (5,087,000)