Annual report [Section 13 and 15(d), not S-K Item 405]

Document and Entity Information

v3.25.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Mar. 29, 2025
Jun. 30, 2024
Document and Entity Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Document Transition Report false    
Securities Act File Number 001-41429    
Entity Registrant Name PROMIS NEUROSCIENCES INC.    
Entity Incorporation, State or Country Code A6    
Entity Tax Identification Number 98-0647155    
Entity Address, Address Line One Suite 200, 1920 Yonge Street    
Entity Address, City or Town Toronto    
Entity Address, State or Province ON    
Entity Address, Postal Zip Code M4S 3E2    
City Area Code 416    
Local Phone Number 847-6898    
Title of 12(b) Security Common Shares, No Par Value per Share    
Trading Symbol PMN    
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 true    
Entity Ex Transition Period false    
Document Financial Statement Error Correction [Flag] false    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Public Float     $ 29.7
Entity Common Stock, Shares Outstanding   32,689,190  
Documents Incorporated by Reference [Text Block]

Portions of the registrant’s definitive proxy statement relating to its 2025 annual meeting of shareholders, or the 2025 Proxy Statement, are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The 2025 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.

    
Auditor Name Baker Tilly US, LLP    
Auditor Location Tewksbury, Massachusetts    
Auditor Firm ID 23    
Entity Central Index Key 0001374339    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false