Segment Information - Capital Expenditures and Depreciation Expense By Operating Segments (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Oct. 27, 2013		Oct. 28, 2012
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,740	[1]	$ 1,881	[1]
Depreciation expense	2,636		2,539
Operating Segments [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Capital expenditures	1,199		1,720
Depreciation expense	2,331		2,219
Operating Segments [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Capital expenditures	521		40
Depreciation expense	305		320
Unallocated corporate [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 20		$ 121

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