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Balance Type:
Period Type:

Stock-based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Mar. 14, 2025	Mar. 13, 2025	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Jun. 30, 2025
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate inducement awards outstanding			3,613,410
Number of options, outstanding			6,195,400
Common stock, shares outstanding			104,044,508		98,776,265
Weighted average exercise price, issued			$ 17.12
Stock-based compensation expense recognized			$ 7,132	$ 3,426
Nominal amount of expense in relation to ESPP recognized			276	186
Accrued expenses			24,514		$ 20,446
Unrecognized stock-based compensation expense related to unvested options granted			$ 23,200
Weighted average period for recognition of unvested options granted			3 years 1 month 6 days
Employee Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period for recognition of unvested options granted			3 years 2 months 12 days
RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of other than options, outstanding			60,000
Number of shares, granted			2,909,010
Number of shares, vested			169,306
Stock-based compensation expense recognized			$ 4,600	1,800
Unrecognized stock-based compensation expense related to unvested options granted			$ 68,700
Directors' Deferred Share Unit Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, vested			197,932
Stock-based compensation expense recognized			$ 1,000
Accrued expenses			$ 3,600
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options, outstanding			3,234,410
Number of shares, granted			307,610
Stock-based compensation expense recognized			$ 2,400	$ 1,600
Nominal amount of expense in relation to ESPP recognized			$ 100
Nominal amount of expense in relation to ESPP			33,787
Performance shares units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage			200.00%
Number of other than options, outstanding			319,000
Number of shares, granted			34,500
Vesting period			36 months
Requisite service period			36 months
Performance shares units \| Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted			319,500
Performance shares units \| Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted			639,000
MindMed Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage		15.00%	15.00%
Number of shares, granted	0
Vesting rights, description			Prior to March 14, 2025, the Company was authorized to issue a number of equity awards equal to 15% of the Company’s issued and outstanding Common Shares under the terms of the 2020 Option Plan, together with Common Shares that were issuable pursuant to outstanding awards or grants under any other compensation or incentive mechanism involving the issuance or potential issuance of Common Shares, including the MindMed Performance and Restricted Share Unit Plan (“2020 PRSU Plan”) and ESPP.
MindMed Stock Option Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares outstanding						9,318,090
MindMed Stock Option Plan \| Restricted Share Unit Awards and Performance Share Unit Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares outstanding						5,817,111
MindMed Stock Option Plan \| Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares outstanding						3,500,979
2025 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares reserved for future issuance						4,500,000
2025 Equity Incentive Plan \| RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted			2,270,010
2025 Equity Incentive Plan \| Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted			425,935
2025 Equity Incentive Plan \| Performance shares units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted			285,000
PRSU Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage			15.00%
Number of shares, granted	0