Income Taxes - U.S. Tax Law Change - Narrative (Detail) - GILTI [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
Aug. 02, 2020	Jan. 31, 2021	May 03, 2020	Apr. 28, 2019
Income Taxes [Line Items]
Income tax charge of during period			$ 1.9	$ 2.1
Non-cash income tax benefit	$ 3.5	$ 3.5

Income tax reconciliation income tax expense benefit at global intangible low taxed income tax.

No definition available.

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