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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. |  |  |  |  |  |

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