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Income Taxes - Deferred Income Taxes - Valuation Allowance - Narrative (Detail) - USD ($) | 12 Months Ended
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Apr. 30, 2017 | May 01, 2016 | May 03, 2015
Income Taxes [Line Items] |  |  |
Valuation allowance | $ 536,000 | $ 590,000 |
Poland [Member] | Culp Europe [Member] |  |  |
Income Taxes [Line Items] |  |  |
Income tax expense (benefit) related to changes in the valuation allowance for deferred tax assets |  | (289,000) | $ 50,000
Poland [Member] | Valuation Allowance, Operating Loss Carryforwards [Member] | Culp Europe [Member] |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance | 72,000 | 72,000 |
U.S. Tax Authorities and Poland Tax Authorities [Member] | Valuation Allowance, Operating Loss Carryforwards [Member] |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance | 536,000 | 590,000 |
U.S. State Tax [Member] | Valuation Allowance, Operating Loss Carryforwards [Member] |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance | 464,000 | 518,000 |
Canada and China [Member] |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance | 0 | 0 |
U.S. Tax Authorities [Member] |  |  |
Income Taxes [Line Items] |  |  |
Income tax expense (benefit) related to changes in the valuation allowance for deferred tax assets | $ (54,000) | $ (43,000) | $ (105,000)

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e32123-109318 + Details
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