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Moderna Collaboration and License Agreement - Narratives (Details) $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
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Sep. 30, 2024 USD ($) target | Jul. 03, 2024 USD ($) | Jun. 30, 2024 USD ($) | Jan. 31, 2022 USD ($) product target | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) target obligation | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Collaboration revenues |  |  |  |  | $ 3,400 | $ 3,800 | $ 16,000 | $ 10,600 |  |
Deferred revenue liability | $ 41,932 |  |  |  | 41,932 | 46,185 | 41,932 | 46,185 | $ 46,413 | $ 47,459
Collaboration revenues |  |  |  |  | 3,385 | $ 3,827 | 15,979 | $ 10,630 |  |
Option Right Collaboration Revenues |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Collaboration revenues |  |  |  |  |  |  | 3,800 |  |  |
Milestones |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Collaboration revenues |  |  |  |  |  |  | $ 2,000 |  |  |
Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Number of potential research target designations | target |  |  |  |  |  |  | 12 |  |  |
Collaboration and License Agreement | Research and Development Services |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Variable consideration |  |  |  |  |  |  | $ 73,900 |  |  |
Term of contract (in years) |  |  |  |  |  |  | 5 years |  |  |
Noncurrent portion of deferred revenue | $ 41,300 |  |  |  | 41,300 |  | $ 41,300 |  |  |
Moderna License Agreement | Research and Development Services |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Collaboration revenues |  |  |  |  |  |  | 35,000 |  |  |
Moderna License Agreement | Option Right Collaboration Revenues |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Collaboration revenues |  |  |  |  |  |  | 3,800 |  |  |
Moderna | Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Maximum of research targets | target |  |  |  | 12 |  |  |  |  |  |
Number of research targets, designate as development targets | target | 12 |  |  |  |  |  |  |  |  |
Number of nominated autoimmune target | target |  |  |  | 2 |  |  |  |  |  |
Number of research targets designated | target | 7 |  |  |  |  |  |  |  |  |
Moderna | Collaboration and License Agreement | Research and Development Services |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Upfront non-refundable payment received |  |  |  | $ 45,000 |  |  | $ 45,000 |  |  |
Number of potential products to develop and commercialize | product |  |  |  | 12 |  |  |  |  |  |
Minimum commitment to reimburse research and development costs |  |  |  | $ 10,000 |  |  |  |  |  |
Period of reimbursement of research and development costs (in years) |  |  |  | 3 years |  |  |  |  |  |
Number of performance obligations | obligation |  |  |  |  |  |  | 2 |  |  |
Moderna | Collaboration and License Agreement | Research and Development Services | Minimum |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Amount receivable per product |  |  |  | $ 247,000 |  |  |  |  |  |
Moderna | Collaboration and License Agreement | Research and Development Services | Maximum |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Amount receivable per product |  |  |  | $ 253,000 |  |  |  |  |  |
Moderna | Moderna License Agreement |  |  |  |  |  |  |  |  |  |
Moderna Collaboration and License Agreement |  |  |  |  |  |  |  |  |  |
Milestone payment |  |  | $ 2,000 |  |  |  |  |  |  |
Collaboration revenues |  |  | $ 2,000 |  |  |  |  |  |  |
Proceeds related to collaboration revenue |  | $ 2,000 |  |  |  |  |  |  |  |
Deferred revenue liability | $ 45,000 |  |  |  | $ 45,000 |  | $ 45,000 |  |  |
Decrease in contract with customer, liability |  |  |  |  |  |  | $ 3,800 |  |  |

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