Segment Information - Capital Expenditures and Depreciation Expense for Operating Segments (Detail) - USD ($) $ in Thousands		3 Months Ended
		Jul. 30, 2023	Jul. 31, 2022
Segment Reporting Information [Line Items]
Capital expenditures	[1]	$ 714	$ 583
Depreciation expense		1,635	1,770
Operating Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Capital expenditures	[1]	523	197
Depreciation expense		1,455	1,568
Operating Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Capital expenditures	[1]	158	360
Depreciation expense		180	202
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Capital expenditures	[1]	$ 33	$ 26

[1] Capital expenditure amounts are stated on the accrual basis. See Consolidated Statements of Cash Flows for capital expenditure amounts on a cash basis.