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Income Taxes - Unrecognized Tax Benefit (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Apr. 29, 2018	Apr. 30, 2017
Income Tax Disclosure [Abstract]
Reduction to unrecognized tax benefits resulting from reduction in U.S. Federal income tax rate pursuant to Tax Act	$ 11.8
Reduction to unrecognized tax benefits resulting from a lapse of the applicable statute of limitations		$ 3.5

X

- Definition

Amount of decrease in unrecognized tax benefits attributable to changes in income tax rates.

+ References

No definition available.

+ Details

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Namespace Prefix:	culp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

+ Details

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