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

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

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
Document and Entity Information - USD ($) $ in Millions	Dec. 31, 2025	Mar. 25, 2026	Jun. 30, 2025
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
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
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 29.7
Entity Common Stock, Shares Outstanding		8,967,693
Documents Incorporated by Reference [Text Block]	Portions of the registrant’s definitive proxy statement relating to its 2026 annual meeting of shareholders, or the 2026 Proxy Statement, are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The 2026 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	2025
Document Fiscal Period Focus	FY
Amendment Flag	false