Document And Entity Information - shares	9 Months Ended
	Jul. 31, 2022	Sep. 02, 2022
Document Information [Line Items]
Entity Central Index Key	0000740664
Amendment Flag	false
Current Fiscal Year End Date	--10-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jul. 31, 2022
Document Transition Report	false
Entity File Number	000-13301
Entity Registrant Name	R F INDUSTRIES LTD
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	88-0168936
Entity Address, Address Line One	7610 Miramar Road, Building 6000
Entity Address, City or Town	San Diego
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92126
City Area Code	858
Local Phone Number	549-6340
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	RFIL
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,156,191