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Segment Information - Narrative (Detail)			12 Months Ended
	Apr. 30, 2017 Customer	May 01, 2016 Customer	Apr. 30, 2017 Customer Segment	May 01, 2016 Customer	May 03, 2015 Customer
Segment Reporting Information [Line Items]
Number of business segments | Segment			2
Currency Concentration Risk [Member] | Net sales [Member] | USD [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage			92.00%	93.00%	92.00%
Geographic Concentration Risk [Member] | Net sales [Member] | International [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage			22.00%	22.00%	22.00%
Customer Concentration Risk [Member] | Net sales [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage			11.00%	13.00%	13.00%
Number of major customers			1	1	1
Customer Concentration Risk [Member] | Net sales [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage			23.00%	22.00%	20.00%
Number of major customers			2	2	2
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Number of major customers	0	0
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Upholstery Fabrics [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	10.00%	10.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	18.00%	16.00%
Number of major customers	1	1

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- Definition

The number of major customers of concentration risk.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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