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Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) - USD ($) $ in Thousands		Apr. 29, 2018	Jan. 28, 2018	Oct. 29, 2017	Jul. 30, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 30, 2016	Jul. 31, 2016	May 01, 2016
Segment Reporting Information [Line Items]
property, plant and equipment		$ 51,794	$ 51,838	$ 52,530	$ 52,912	$ 51,651	$ 50,333	$ 45,537	$ 41,745
United States [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant and equipment		35,400				34,000				$ 24,800
United States [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant and equipment		1,800				1,200				893
Canada [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant and equipment		13,400				14,900				12,700
China [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
property, plant and equipment		661				655				671
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
property, plant and equipment	[1]	552				856				929
Unallocated Corporate [Member] | United States [Member]
Segment Reporting Information [Line Items]
property, plant and equipment		$ 552				$ 856				$ 929
[1] The $552, $856, and $929 balance at April 29, 2018, April 30, 2017, and May 1, 2016, represent property, plant, and equipment associated with unallocated corporate departments and corporate departments shared by both the mattress and upholstery fabric segments located in the U.S.

X

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(14))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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- Definition

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