| Cover | May 16, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 16, 2022 |
| 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 | 4546 El Camino Real |
| Entity Address, Address Line Two | Suite B1 |
| Entity Address, City or Town | Los Altos |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94022 |
| City Area Code | (650) |
| Local Phone Number | 284-4433 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | RNXT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
