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Cover - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2025
Mar. 23, 2026
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K/A    
Amendment Flag true    
Amendment Description This Amendment No. 1 on Form 10-K/A (this “Amendment”) amends the Annual Report on Form 10-K of RenovoRx, Inc. (“Company”) for the year ended December 31, 2025 filed with the Securities and Exchange Commission (the “Commission”) on March 30, 2026 (the “Original Filing”). In response to a comment letter from the Commission staff, this Amendment is being filed solely to revise (i) Part I, Item 1A. “Risk Factors” (“Item 1A”) to revise certain risk factors disclosures relating to previously identified material weaknesses in internal control over financial reporting (which were remediated as of December 31, 2025) and (ii) the Company’s disclosures under Part II, Item 9A. “Controls and Procedures” (“Item 9A”) by adding additional disclosure regarding management’s assessments and conclusions of the Company’s internal control over financial reporting as of December 31, 2025, which was not included in Item 9A in the Original Filing. Management’s assessment, as reported in the Original 10-K, that such internal control over financial reporting was effective at December 31, 2025 remain unchanged. The revised risk factors are captioned “We have previously identified material weaknesses in our internal control over financial reporting. Failure to maintain effective internal controls could cause our investors to lose confidence in us and adversely affect the market price of our common stock. If our internal controls are not effective, we may not be able to accurately report our financial results or prevent fraud” and “We previously found our disclosure controls and procedures were not effective, and there is a risk that we may do so again, which could have an adverse effect on our company.” In accordance with Rule 12b-15 of the Securities and Exchange Act of 1934, as amended, this Amendment amends and restates Item 1A and Item 9A of the Original Filing in their entirety, but solely for purposes of the above described limited revisions. In addition, as required by Rule 12b-15, new certifications by the Company’s principal executive officer and principal financial officer are filed as exhibits to this Amendment. Except as described above, no other changes have been made to the Original Filing. This Amendment continues to speak as of the date of the Original Filing, and the Company has not updated the disclosures contained therein to reflect any events that occurred subsequent to the date of the Original Filing. Accordingly, this Amendment should be read together with the Original Filing.    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-40738    
Entity Registrant Name RENOVORX, INC.    
Entity Central Index Key 0001574094    
Entity Tax Identification Number 27-1448452    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 2570 West El Camino Real    
Entity Address, Address Line Two Suite 640    
Entity Address, City or Town Mountain View    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94040    
City Area Code 650    
Local Phone Number 284-4433    
Title of 12(b) Security Common Stock, $0.0001 par value    
Trading Symbol RNXT    
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 true    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 26.6
Entity Common Stock, Shares Outstanding   45,052,706  
Documents Incorporated by Reference None    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Listing, Par Value Per Share $ 0.0001