SHARE-BASED COMPENSATION - Share options (Details)	12 Months Ended
SHARE-BASED COMPENSATION - Share options (Details)	Dec. 31, 2025 $ / shares	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 $ / shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2025 USD ($) $ / shares shares
Number of Share Options
Outstanding at the end		180,827
Canadian Dollar Share Options
Number of Share Options
Outstanding at the beginning		32,740		35,930
Granted		0		0
Forfeited		(2,346)
Expired		(14,704)		(3,191)
Outstanding at the end		15,690		32,740	35,930	35,930
Vested and exercisable at the end							15,413
Weighted Average Exercise Price Per Share
Outstanding at the beginning (in dollars per share) \| $ / shares	$ 184		$ 189.5
Forfeited (in dollars per share) \| $ / shares	209
Expired (in dollars per share) \| $ / shares	54.58		229
Outstanding at the end (in dollars per share) \| $ / shares	170		$ 184			$ 189.5
Vested and exercisable at the end (in dollars per share) \| $ / shares	$ 170.5
Weighted Average Remaining Contractual Term (years) and Aggregate Intrinsic Value
Outstanding at the beginning (in years)		6 years		6 years 7 months 6 days	6 years 6 months	6 years 6 months
Outstanding at the end (in years)		6 years		6 years 7 months 6 days	6 years 6 months	6 years 6 months
Vested and exercisable at the end (in years)		6 years
Fair value of options in a share based payment arrangement \| $							$ 199,263
US Dollar Share Options
Number of Share Options
Outstanding at the beginning		110,238		2,760
Granted		55,400		107,478
Forfeited		(501)
Outstanding at the end		165,137		110,238	2,760	2,760
Vested and exercisable at the end							47,421
Weighted Average Exercise Price Per Share
Outstanding at the beginning (in dollars per share) \| $ / shares		$ 28.25		$ 46.75
Granted (in dollars per share) \| $ / shares		11.81		27.75
Forfeited (in dollars per share) \| $ / shares		46.75
Outstanding at the end (in dollars per share) \| $ / shares		$ 22.75		$ 28.25	$ 46.75
Vested and exercisable at the end (in dollars per share) \| $ / shares							$ 28.5
Weighted Average Remaining Contractual Term (years) and Aggregate Intrinsic Value
Outstanding at the beginning (in years)		9 years
Outstanding at the end (in years)		9 years
Vested and exercisable at the end (in years)		8 years 7 months 6 days
Grant date fair value of share options granted \| $		$ 55,400		$ 107,478

ProMIS Neurosciences Inc. 10-K