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Income Taxes - Deferred Income Taxes - Valuation Allowance - Narrative (Detail) - USD ($)	Jan. 28, 2018	Apr. 30, 2017	Jan. 29, 2017
U.S. Tax Authorities and Poland Tax Authorities [Member]
Income Taxes [Line Items]
Valuation allowance	$ 2,900,000	$ 536,000	$ 557,000
Canada and China [Member]
Income Taxes [Line Items]
Valuation allowance	0	0	0
Valuation Allowance, Operating Loss Carryforwards [Member] | U.S. State Tax [Member]
Income Taxes [Line Items]
Valuation allowance	495,000	464,000	473,000
Unused Foreign Tax Credits, Tax Cuts and Jobs Act of 2017 [Member] | Internal Revenue Service (IRS) [Member] | Valuation Allowance, Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Valuation allowance	2,300,000
Culp Europe [Member] | Poland [Member] | Valuation Allowance, Operating Loss Carryforwards [Member]
Income Taxes [Line Items]
Valuation allowance	$ 73,000	$ 72,000	$ 84,000

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- Definition

Income Taxes [Line Items]

+ References

No definition available.

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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