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Income Taxes (Detail) (USD $) | 3 Months Ended | 9 Months Ended |  |  |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended |  |  | 9 Months Ended | 24 Months Ended |  | 3 Months Ended | 9 Months Ended | 36 Months Ended | 9 Months Ended |  |  |  |  | 9 Months Ended
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Jan. 27, 2013 | Jan. 29, 2012 | Jan. 27, 2013 | Jan. 29, 2012 | Oct. 28, 2012 | Apr. 29, 2012 | Jan. 27, 2013 Deferred Income Taxes Net Noncurrent [Member] | Jan. 27, 2013 Income Taxes Payable - Long-Term [Member] | Jan. 27, 2013 Mattress Fabrics [Member] | Oct. 28, 2012 Mattress Fabrics [Member] | Jan. 29, 2012 Mattress Fabrics [Member] | Oct. 30, 2011 Mattress Fabrics [Member] | Jan. 27, 2013 Mattress Fabrics [Member] | Jan. 29, 2012 Mattress Fabrics [Member] | Jan. 27, 2013 U.S. Tax Authorities and Poland Tax Authorities [Member] Deferred Tax Asset Loss Carryforwards [Member] | Jan. 27, 2013 U.S. State Tax [Member] | Jan. 27, 2013 U.S. State Tax [Member] Deferred Tax Asset Loss Carryforwards [Member] | Apr. 29, 2012 Poland [Member] | Jan. 27, 2013 Poland [Member] Culp Europe [Member] | Oct. 28, 2012 Poland [Member] Culp Europe [Member] | Jan. 27, 2013 Poland [Member] Culp Europe [Member] Deferred Tax Asset Loss Carryforwards [Member] | Oct. 28, 2012 U.S. Tax Authorities [Member] | Jan. 27, 2013 U.S. Tax Authorities [Member] | Jan. 29, 2012 U.S. Tax Authorities [Member] | Apr. 29, 2012 U.S. Tax Authorities [Member] | Jan. 27, 2013 U.S. Tax Authorities [Member] Canada and China Subsidiaries [Member] | Jan. 27, 2013 China [Member] | Apr. 29, 2012 China [Member] | Jan. 27, 2013 Canada [Member] | Apr. 29, 2012 Canada [Member] | Jan. 27, 2013 Canada and China [Member] | Jan. 29, 2012 Canada and China [Member]
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax rate |  |  | (1.30%) | (13.40%) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income taxes | $ 1,700,000 | $ 1,075,000 | $ (188,000) | $ (1,168,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory rate |  |  | 34.00% | 34.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in effective income tax rate from the change of valuation allowance for net deferred income tax assets |  |  |  | (50.00%) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  | (84.00%) | (50.00%) |  |  |  |  |  |  |  |
Income tax expense (benefit) related to changes in the valuation allowance for deferred tax assets |  |  |  | (4,400,000) |  |  |  |  |  |  |  |  |  |  |  |  | 103,000 |  |  | 207,000 |  |  | (12,200,000) | (12,100,000) | (4,400,000) |  |  |  |  |  |  |  |
Increase in effective income tax rate from the establishment of a deferred tax liability for undistributed earnings |  |  | 46.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 46.00% |  |  |  |  |  |
Income tax expense (benefit) from change in treatment of undistributed earnings |  |  | 6,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,600,000 |  |  |  |  |  |
Reduction in income tax rate from the lower statutory income tax rates in foreign jurisdictions compared with the U.S statutory income tax rate |  |  | (6.00%) | (7.00%) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (6.00%) | (7.00%)
Increase in income tax rate from an increase in unrecognized tax benefits |  |  | 5.00% | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in income tax rate for stock-based compensation and other miscellaneous items |  |  | 2.70% | 2.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation allowance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 926,000 |  | 719,000 |  |  |  | 207,000 |  |  |  | 12,800,000 |  |  |  |  |  |  |
Operating loss carryforwards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 59,900,000 |  |  |  |  |  |  |
Income before income taxes | 4,523,000 | 2,877,000 | 14,426,000 | 8,705,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,100,000) |  | 3,400,000 |  |  | 11,900,000 |  |  |  |  |  |  |
Net sales | 63,695,000 | 60,450,000 | 198,439,000 | 178,733,000 |  |  |  |  |  | 35,513,000 | 77,700,000 | 34,719,000 | 67,400,000 | 113,175,000 | 102,130,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage increase in net sales |  |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income | 4,863,000 | 2,993,000 | 15,010,000 | 9,040,000 |  |  |  |  |  | 4,166,000 | 10,300,000 | 3,134,000 | 7,000,000 | 14,512,000 | 10,087,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage increase in operating income |  |  |  |  |  |  |  |  |  |  | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undistributed earnings from our foreign subsidiaries that will be distributed to the parent company |  |  |  |  | 55,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated earnings and profits from foreign subsidiaries | 56,300,000 |  | 56,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Domestic and foreign withholding taxes | 21,900,000 |  | 21,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax credits | 15,100,000 |  | 15,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating loss carryforwards, expiration period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax expense from expected future year losses of operating loss carryforwards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 115,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax expense from expected current year loss of operating loss carryforward |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 92,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Current deferred tax asset | 4,098,000 | 2,767,000 | 4,098,000 | 2,767,000 |  | 2,467,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,800,000 |  | 2,100,000 |  | 329,000 | 405,000 |  |  |  |
Non-current deferred tax asset | 4,172,000 | 3,903,000 | 4,172,000 | 3,903,000 |  | 3,205,000 | [1] |  |  |  |  |  |  |  |  |  |  |  | 115,000 |  |  |  |  | 3,400,000 |  | 2,100,000 |  | 793,000 | 1,000,000 |  |  |  |
Non-current deferred tax liability | 856,000 | 659,000 | 856,000 | 659,000 |  | 705,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 856,000 | 705,000 |  |
Unrecognized tax benefits | 13,100,000 |  | 13,100,000 |  |  |  |  | 8,900,000 | 4,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefits that would favorably impact effective income tax rate if recognized | 4,200,000 |  | 4,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected increase in unrecognized tax benefits related to double taxation under applicable tax treaties with foreign tax jurisdictions | $ 821,000 |  | $ 821,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Derived from audited financial statements.

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- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to differences in the deductibility or nondeductibility of incentive stock options and other equity-based compensation costs in accordance with generally accepted accounting principles and enacted tax laws. + 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=6907707&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=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817 + Details
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- Definition The sum of the differences between the effective income tax rate and domestic federal statutory income tax rate attributable to changes in all income tax contingencies, whether recorded or adjusted, during the period. + 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=6907707&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=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817 + Details
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- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 5 + Details
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- Definition The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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- Definition The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6907707&loc=d3e32687-109319 Reference 3: 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=6907707&loc=d3e32698-109319 Reference 4: 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=21917399&loc=d3e32123-109318 + Details
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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the United States that are not subject to U.S. federal income taxes. + References No definition available. + Details
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- Definition The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns. + 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=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 + Details
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