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General and Summary of Significant Accounting Policies - Narrative (Detail) |  |  |  | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) | Apr. 29, 2019 USD ($) | Jun. 22, 2018 | Jan. 31, 2021 | May 02, 2021 USD ($) Segment | May 03, 2020 USD ($) | Apr. 28, 2019 USD ($) | Feb. 01, 2021 | Apr. 30, 2018 USD ($) | Jan. 01, 2017
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of Operating Segments | Segment |  |  |  |  |  | 2 |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  | 50.00% | 50.00% | 50.00% |  |  |
Unrealized gain (loss) on investments |  |  |  |  |  | $ 24,000 |  |  |  |  |
Short-term investments (Available-for-Sale) |  |  |  |  |  | 5,500,000 | $ 923,000 |  |  |  |
Long-term investments (Rabbi Trust) |  |  |  |  |  | 8,415,000 | 7,834,000 |  |  |  |
Amortized cost of held-to-maturity investments |  |  |  |  |  | 4,300,000 | 6,300,000 |  |  |  |
Fair value of held-to-maturity investments |  |  |  |  |  | 4,300,000 | 6,400,000 |  |  |  |
Advertising costs, discontinued operations |  |  |  |  |  |  | 1,700,000 | $ 2,200,000 |  |  |
Advertising costs, continuing operations |  |  |  |  |  | 0 | 0 | 0 |  |  |
Interest costs incurred on long-term debt and lines of credit |  |  |  |  |  | 51,000 | 190,000 | 65,000 |  |  |
Interest costs incurred, discontinued operations |  |  |  |  |  |  | 84,000 | 30,000 |  |  |
Interest costs incurred, continuing operations |  |  |  |  |  | 51,000 | 106,000 | 35,000 |  |  |
Interest cost capitalized |  |  |  |  |  | 0 | 0 | 0 |  |  |
Asset impairment charges |  |  |  |  |  | 0 | 33,914,000 | 0 |  |  |
Asset impairment charges from discontinued operations |  |  |  |  |  |  | 20,200,000 |  |  |  |
Asset impairments - continuing operations | [1] |  |  |  |  |  | 13,712,000 |  |  |  |
Goodwill - continuing operations |  |  |  |  |  | $ 0 | 0 |  |  |  |
Dividends received deduction percentage for earnings and profits received from foreign corporation |  |  |  |  |  | 100.00% |  |  |  |  |
Dividends received deduction, foreign corporation ownership percentage |  |  |  |  |  | 10.00% |  |  |  |  |
Accounts receivable - continuing operations |  |  |  |  |  | $ 37,726,000 | 25,093,000 |  |  |  |
Accrued expenses |  |  |  |  |  | 14,839,000 | 5,687,000 |  |  |  |
Selling, general and administrative expenses |  |  |  |  |  | 37,756,000 | 34,424,000 | 33,243,000 |  |  |
Right-of-use assets |  |  |  |  |  | 11,730,000 | 3,903,000 |  |  |  |
Operating Lease Liability |  |  |  |  |  | 9,557,000 |  |  |  |  |
Shipping and Handling [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Selling, general and administrative expenses |  |  |  |  |  | $ 3,900,000 | 4,000,000.0 | $ 4,200,000 |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease, practical expedients, package |  |  | true |  |  |  |  |  |  |  |
Lease, practical expedient, use of hindsight |  |  | false |  |  |  |  |  |  |  |
Right-of-use assets |  |  | $ 7,200,000 |  |  |  |  |  |  |  |
Operating Lease Liability |  |  | $ 7,100,000 |  |  |  |  |  |  |  |
Restatement Adjustment [Member] | Accounting Standards Update 2014-09 [Member] | Allowance For Sales Returns And Allowances [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accounts receivable - continuing operations |  |  |  |  |  |  |  |  |  | $ 1,200,000 |
Accrued expenses |  |  |  |  |  |  |  |  |  | $ 1,200,000 |
Goodwill [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  | 27,200,000 |  |  |  |
Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  | 6,700,000 |  |  |  |
Asset impairments - continuing operations |  |  |  |  |  |  | 143,000 |  |  |  |
Investments (Held-To-Maturity) [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investment maturity period |  |  |  |  |  | 2 years |  |  |  |  |
Short-term Investments (Available-for-Sale) [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on investments |  |  |  |  |  | $ 24,000 | 9,000 |  |  |  |
Long-term investments (Rabbi Trust) [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on investments |  |  |  |  |  | $ 122,000 | $ (19,000) |  |  |  |
CIH [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Majority ownership percentage acquired |  |  |  |  |  |  |  |  | 100.00% |  |
Equity method investment, ownership percentage |  |  |  |  |  |  |  |  |  |  | 50.00%
Percentage of share earnings and losses |  |  |  |  | 50.00% |  | 50.00% | 50.00% |  |  |
eLuxury [Member] |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Majority ownership percentage acquired |  |  |  | 80.00% |  |  |  |  |  |  |
Noncontrolling interest |  |  |  | 20.00% |  |  |  |  |  |  |
Total net asset |  | $ 1,900,000 |  |  |  |  |  |  |  |  |
Loss on disposal of discontinued operation |  | $ 1,900,000 |  |  |  |  |  |  |  |  |
eLuxury [Member] | Shareholders' equity attributable to Culp Inc. |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) allocation percentage |  |  |  | 70.00% |  |  |  |  |  |  |
eLuxury [Member] | Non-Controlling Interest Discontinued Operation |  |  |  |  |  |  |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) allocation percentage |  |  |  | 30.00% |  |  |  |  |  |  |
[1] | During fiscal 2020, we incurred asset impairment charges totaling $13.7 million, of which $13.6 million and $143,000 pertained to goodwill associated with our mattress and upholstery fabric segments and a tradename associated Read, respectively. Of this $13.7 million, $11.5 million and $2.2 million pertained to the mattress fabrics segment and upholstery fabrics segment, respectively.

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