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Document And Entity Information - USD ($)
$ in Millions
 12 Months Ended
Jul. 31, 2022
Oct. 25, 2022
Jan. 31, 2022
Document Information Line Items      
Entity Registrant Name RAFAEL HOLDINGS, INC.    
Trading Symbol RFL    
Document Type 10-K    
Current Fiscal Year End Date --07-31    
Entity Public Float     $ 70.2
Amendment Flag false    
Entity Central Index Key 0001713863    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Jul. 31, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Shell Company false    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Annual Report true    
Document Transition Report false    
Entity File Number 000-55863    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 82-2296593    
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    
Title of 12(b) Security Class B common stock, par value $0.01 per share    
Security Exchange Name NYSE    
Entity Interactive Data Current Yes    
Auditor Firm ID 596    
Auditor Name CohnReznick LLP    
Auditor Location New York, New York    
Class A Common Stock      
Document Information Line Items      
Entity Common Stock, Shares Outstanding   787,163  
Class B Common Stock      
Document Information Line Items      
Entity Common Stock, Shares Outstanding   23,685,649