Income Taxes - Unrecognized Tax Benefit (Parenthetical) (Detail) $ in Millions	12 Months Ended
Apr. 29, 2018 USD ($)
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

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

No definition available.

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