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Grant and Awards (Narrative) (Details) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 29, 2022 | Jun. 15, 2020 | Mar. 13, 2020 | Jul. 31, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Mar. 31, 2024 | Dec. 31, 2023
MTEC Grant |  |  |  |  |  |  |  |  |  |
Government Assistance [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue from grants | $ 16,300,000 | $ 15,000,000.0 |  | $ 21,600,000 |  |  |  |  | $ 16,300,000 |
Government assistance, transaction duration |  | 3 years |  |  |  |  |  |  |  |
Increase in expected revenue from grants | $ 1,300,000 |  |  | $ 5,300,000 |  |  |  |  |  |
Grant revenue from the MTEC Agreement |  |  |  |  | $ 3,000,000.0 | $ 1,200,000 | $ 3,900,000 | $ 3,000,000.0 |  |
Additional grant revenue to be recognized |  |  |  |  | 5,300,000 |  |  |  |  |
Grants receivable |  |  |  |  | 1,600,000 |  | 1,600,000 |  |  | $ 1,500,000
CFF Therapeutics Development Award |  |  |  |  |  |  |  |  |  |
Government Assistance [Line Items] |  |  |  |  |  |  |  |  |  |
Grant revenue from the MTEC Agreement |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 |  |
Proceeds from governments grants |  |  | $ 1,000,000.0 |  |  |  |  |  |  |
Award agreement interruption period |  |  | 360 days |  |  |  |  |  |  |
CFF Therapeutics Development Award | Maximum |  |  |  |  |  |  |  |  |  |
Government Assistance [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue from grants |  |  | $ 5,000,000.0 |  |  |  |  |  |  |

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