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Document And Entity Information - shares
 9 Months Ended
Jul. 31, 2016
Sep. 08, 2016
Document Information [Line Items]    
Entity Registrant Name R F INDUSTRIES LTD  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jul. 31, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0000740664  
Current Fiscal Year End Date --10-31  
Entity Filer Category Smaller Reporting Company  
Trading Symbol RFIL  
Entity Common Stock, Shares Outstanding   8,835,483