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Organization and Basis of Presentation (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 09, 2025 | Dec. 31, 2023 | Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024 | Mar. 09, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Accumulated deficit |  |  | $ 742,003 |  | $ 702,022 |
Cash flows from operations |  |  | 36,828 | $ 36,741 |  |
Cash, cash equivalents |  | $ 130,649 | 68,610 | $ 120,265 | 105,668 |
Janssen Pharmaceuticals Inc | Asset Purchase Agreement |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Non-refundable upfront cash funding |  | 65,000 |  |  |  |
Milestone funding |  |  |  |  | $ 60,000 |
Milestone funding for extension of RPGR product clinical trials |  |  | $ 50,000 |  |  |
Milestone funding for development of drug substances |  | 10,000 |  |  |  |
Milestone funding for development of drug products |  | 5,000 |  |  |  |
Milestone funding for sale of drug products in the US |  | 175,000 |  |  |  |
Milestone funding for sale of drug products in the UK, France, Germany, Spain and Italy |  | 75,000 |  |  |  |
Milestone funding for transfer of manufacturing technology |  | 25,000 |  |  |  |
Milestone funding upon regulatory approval |  | 10,000 |  |  |  |
Hologen Limited | Collaboration Agreement |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Class A shares of Hologen received in transaction |  |  |  |  |  | 250,000
Contingent class A shares receivable of Hologen in transaction |  |  |  |  |  | 500,000
Hologen Limited | Hologen Strategic Agreement |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Milestone funding upfront payment received | $ 200,000 |  |  |  |  |
Milestone funding to provide additional capital | $ 230,000 |  |  |  |  |
Class A share ownership percentage of Hologen Neuro | 30.00% |  |  |  |  |
Class B share ownership percentage of Hologen Neuro | 70.00% |  |  |  |  |
Percentage approval of directors | 70.00% |  |  |  |  |
Hologen Limited | Manufacturing Framework Agreement |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Percentage approval of directors | 70.00% |  |  |  |  |
Purchase option after twelve months, percentage of Company's outstanding common shares | 40.00% |  |  |  |  |
Vesting period, irrevocable option to purchase shares of MeiraGTx Manufacturing | 3 years |  |  |  |  |
Maximum | Janssen Pharmaceuticals Inc | Asset Purchase Agreement |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Contingent Funding Available |  | $ 350,000 |  |  |  |
Maximum | Hologen Limited | Hologen Strategic Agreement |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Milestone funding to provide additional capital | $ 230,000 |  |  |  |  |

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