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Related party transactions - Additional Information (Detail) (USD $)
 12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Related Party Transaction [Line Items]    
Due From Officers Or Stockholders Noncurrent $ 67,000us-gaap_DueFromOfficersOrStockholdersNoncurrent $ 67,000us-gaap_DueFromOfficersOrStockholdersNoncurrent
Chief Executive Officer    
Related Party Transaction [Line Items]    
Due From Officers Or Stockholders Noncurrent 67,000us-gaap_DueFromOfficersOrStockholdersNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember		 67,000us-gaap_DueFromOfficersOrStockholdersNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
Debt Instrument, Interest Rate During Period 6.00%us-gaap_DebtInstrumentInterestRateDuringPeriod
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember		  
Former Director    
Related Party Transaction [Line Items]    
Cost of Services $ 18,000us-gaap_CostOfServices
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rfil_FormerDirectorMember		 $ 6,000us-gaap_CostOfServices
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rfil_FormerDirectorMember