v3.26.3
Cover - USD ($)
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Sep. 28, 2026
Dec. 31, 2025
Cover [Abstract]        
Document Type 10-K      
Amendment Flag false      
Document Annual Report true      
Document Transition Report false      
Document Period End Date Jun. 30, 2026      
Document Fiscal Period Focus FY      
Document Fiscal Year Focus 2026      
Current Fiscal Year End Date --06-30      
Entity File Number 000-04057      
Entity Registrant Name PORTSMOUTH SQUARE, INC.      
Entity Central Index Key 0000079661      
Entity Tax Identification Number 94-1674111      
Entity Incorporation, State or Country Code CA      
Entity Address, Address Line One 1516 S. Bundy Drive      
Entity Address, Address Line Two Suite 200      
Entity Address, City or Town Los Angeles      
Entity Address, State or Province CA      
Entity Address, Postal Zip Code 90025      
City Area Code (310)      
Local Phone Number 889-2500      
Title of 12(g) Security Common Stock, No Par Value      
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       $ 1,269,000
Entity Common Stock, Shares Outstanding     734,187  
Documents Incorporated by Reference [Text Block] None      
ICFR Auditor Attestation Flag false      
Document Financial Statement Error Correction [Flag] false      
Auditor Opinion [Text Block] We have audited the accompanying consolidated balance sheet of Portsmouth Square, Inc. and subsidiaries (the “Company”) as of June 30, 2026, and the related consolidated statements of operations, shareholders’ deficit and cash flows for the year then ended, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of June 30, 2026, and the results of its operations and its cash flows for the year then ended, in conformity with accounting principles generally accepted in the United States of America.      
Auditor Name Whitley Penn LLP WithumSmith+Brown, PC    
Auditor Location Dallas, Texas East Brunswick, NJ    
Auditor Firm ID 726 100