XML 18 R1.htm IDEA: XBRL DOCUMENT v3.26.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Mar. 26, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Amendment Flag false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Documents Incorporated by Reference [Text Block] None    
Entity Information [Line Items]      
Entity Registrant Name OS THERAPIES INCORPORATED    
Entity Central Index Key 0001795091    
Entity File Number 001-42195    
Entity Tax Identification Number 82-5118368    
Entity Incorporation, State or Country Code DE    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Public Float     $ 49.6
Entity Incorporation, Date of Incorporation Jun. 24, 2019    
Entity Contact Personnel [Line Items]      
Entity Address, Address Line One 115 Pullman Crossing Road    
Entity Address, Address Line Two Suite 103    
Entity Address, City or Town Grasonville    
Entity Address, State or Province MD    
Entity Address, Postal Zip Code 21638    
Entity Phone Fax Numbers [Line Items]      
City Area Code (410)    
Local Phone Number 297-7793    
Entity Listings [Line Items]      
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol OSTX    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   39,533,227