| Cover | Oct. 28, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 28, 2021 |
| Entity File Number | 1-38411 |
| Entity Registrant Name | RAFAEL HOLDINGS, INC. |
| Entity Central Index Key | 0001713863 |
| Entity Tax Identification Number | 82-2296593 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 520 Broad Street |
| Entity Address, City or Town | Newark |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07102 |
| City Area Code | 212 |
| Local Phone Number | 658-1450 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class B common stock, par value $0.1 per share |
| Trading Symbol | RFL |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
