v3.26.3
Cover - USD ($)
 12 Months Ended
Jul. 31, 2026
Oct. 01, 2026
Jan. 31, 2026
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Jul. 31, 2026    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Current Fiscal Year End Date --07-31    
Entity File Number 1-3647    
Entity Registrant Name MAYS J W INC    
Entity Central Index Key 0000054187    
Entity Tax Identification Number 11-1059070    
Entity Incorporation, State or Country Code NY    
Entity Address, Address Line One 9 Bond Street    
Entity Address, City or Town Brooklyn    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 11201    
City Area Code 718    
Local Phone Number 624-7400    
Title of 12(b) Security Common Stock, $1 par value    
Trading Symbol MAYS    
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    
Entity Shell Company false    
Entity Public Float     $ 19,911,516
Entity Common Stock, Shares Outstanding   2,015,780  
Documents Incorporated by Reference [Text Block] Portions of the Registrant’s definitive proxy statement relating to its 2026 annual meeting of shareholders are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The Registrant’s definitive proxy statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Name Prager Metis CPAs, LLC    
Auditor Location Hackensack, New Jersey    
Auditor Firm ID 273