Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2022	Jan. 02, 2023	Apr. 30, 2022
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Oct. 31, 2022
Document Transition Report	false
Entity File Number	0-13301
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, Bldg. 6000
Entity Address, City or Town	San Diego
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92126-4202
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 Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 59.9
Entity Common Stock, Shares Outstanding (in shares)		10,193,287
Auditor Name	CohnReznick LLP
Auditor Location	Tysons, Virginia
Auditor Firm ID	596
Entity Central Index Key	0000740664
Current Fiscal Year End Date	--10-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false