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Goodwill - Summary of Change in Carrying Amount of Goodwill (Parenthetical) (Detail) - USD ($) | Jan. 31, 2021 | May 03, 2020 | Apr. 30, 2020 | Feb. 02, 2020 | May 02, 2019
--- | --- | --- | --- | --- | ---
Goodwill [Line Items] |  |  |  |  |
Goodwill | $ 0 |  | $ 0 | $ 16,011,000 | $ 27,222,000
Goodwill | $ 0 | $ 0 |  | 13,569,000 |
Goodwill [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  |  |  | 13,600,000 |
Noncurrent Assets Discontinued Operation [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  |  |  | $ 2,400,000 |

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- Definition Goodwill including discontinued operation. + References No definition available. + Details
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Namespace Prefix: | culp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |