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Stock-based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Feb. 27, 2020	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average exercise price, issued		$ 2.98
Number of shares, vested		99,260
Stock-based compensation expense recognized		$ 3,750	$ 3,792
Accrued expenses		6,687		$ 5,877
Unrecognized stock-based compensation expense related to unvested options granted		$ 14,300
CAD
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period for recognition of unvested options granted		2 years 4 months 24 days
USD
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted		63,600
Weighted average period for recognition of unvested options granted		3 years 9 months 18 days
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense recognized		$ 1,941	$ 1,787
Restricted Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted		1,048,930
Stock-based compensation expense recognized		$ 2,000
Unrecognized stock-based compensation expense related to unvested options granted		$ 20,000
Restricted Share Units \| CAD
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period for recognition of unvested options granted		2 years 6 months
Restricted Share Units \| USD
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted		1,048,930
Weighted average period for recognition of unvested options granted		4 years
Directors' Deferred Share Unit Plan \| General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued expenses		$ 200
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense recognized		$ 1,700
MindMed Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	15.00%
Vesting rights, description			The 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 “Transaction”) and is authorized to issue 15% of the Company’s outstanding Common Shares under the terms of the Plan.