Document And Entity Information - shares	6 Months Ended
	Apr. 30, 2018	Jun. 04, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
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
Trading Symbol	RFIL
Entity Common Stock, Shares Outstanding		9,159,392