Stock-based Compensation - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
	Feb. 27, 2024	Feb. 27, 2020	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 10, 2024	Dec. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, vested					133,745
Stock-based compensation expense recognized			$ 5,228	$ 3,842	$ 9,698	$ 7,592
Accrued expenses			8,231		8,231			$ 11,634
Unrecognized stock-based compensation expense related to unvested options granted			$ 12,100		$ 12,100
Weighted average period for recognition of unvested options granted					2 years 4 months 24 days
Number of shares, issued					0
Common Stock, Shares, Issued			72,075,076		72,075,076			41,101,303
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense recognized			$ 3,046	2,073	$ 6,061	4,013
Restricted Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense recognized			2,700	2,100	4,800	4,100
Unrecognized stock-based compensation expense related to unvested options granted			11,100		$ 11,100
Weighted average period for recognition of unvested options granted					2 years 4 months 24 days
Directors' Deferred Share Unit Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense recognized			200		$ 600
Directors' Deferred Share Unit Plan | General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued expenses			1,000		1,000
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense recognized			$ 2,700	$ 1,600	$ 4,300	$ 3,300
Employee Share Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares reserved for future issuance							750,000
Common Stock, Shares, Issued			0		0
MindMed Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	15.00%
Vesting rights, description		The Stock Option Plan was approved by the shareholders as part of the terms of an arrangement agreement (the “Arrangement”) entered into by the Company on October 15, 2019 in connection with the completion of its reverse acquisition, which completed on February 27, 2020. The Company is authorized to issue 15% of the Company’s outstanding Common Shares under the terms of the Stock Option Plan, together with Common Shares that are 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 RSU Plan.