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Discontinued operations - Additional Information (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]    
Royalty revenue $ 161us-gaap_RoyaltyRevenue $ 0us-gaap_RoyaltyRevenue
Radio Mobile, Inc    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Royalty revenue 136us-gaap_RoyaltyRevenue
/ us-gaap_CounterpartyNameAxis
= rfil_RadioMobileIncMember		  
RF Neulink    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Royalty revenue $ 25us-gaap_RoyaltyRevenue
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= rfil_RfNeulinkMember