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Summary of Financial Information Related to RF Neulink (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Oct. 31, 2014 | Oct. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Royalties | $ 161 us-gaap_RoyaltyRevenue | $ 0 us-gaap_RoyaltyRevenue
Net sales | 0 rfil_DisposalGroupIncludingDiscontinuedOperationSalesRevenue | 1,230 rfil_DisposalGroupIncludingDiscontinuedOperationSalesRevenue
Total revenue | 161 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue | 1,230 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Cost of sales | 0 us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold | 1,609 us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold
Gross profit (loss) | 161 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss | (379)us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss
Operating expenses | 0 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense | 1,400 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
Operating income (loss) | 161 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss | (1,779)us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
Provision (benefit) for income taxes | 58 us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalBeforeIncomeTax | (639)us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalBeforeIncomeTax
Income (loss) from discontinued operations, net of tax | $ 103 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest | $ (1,140)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest

X
- Definition Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References No definition available. + Details
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Namespace Prefix: | rfil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, before tax, of loss recognized for the write-down to fair value, less cost to sell, of a disposal group. Includes before tax gain for a subsequent increase in fair value (less cost to sell) up to the cumulative loss previously recognized through write-downs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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Balance Type: | debit
Period Type: | duration

X
- Definition Amount of costs of goods sold attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gross profit attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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X
- Definition Amount of operating expenses attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of operating income or loss attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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X
- Definition Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items, which is apportioned to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This item includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4568447-111683 + Details
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- Definition Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights. + 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(e)) -URI http://asc.fasb.org/extlink&oid=26872669&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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