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Document and Entity Information
 3 Months Ended
Jan. 31, 2012
Mar. 15, 2011
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jan. 31, 2012  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q1  
Trading Symbol RFIL  
Entity Registrant Name R F INDUSTRIES LTD  
Entity Central Index Key 0000740664  
Current Fiscal Year End Date --10-31  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   6,859,888