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Grants and Awards (Narrative) (Details) - USD ($) $ in Thousands |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 29, 2025 | Jul. 29, 2024 | Sep. 29, 2022 | Mar. 13, 2020 | Apr. 30, 2020 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Jun. 15, 2020
MTEC Grant |  |  |  |  |  |  |  |  |  |  |
Government Assistance [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from grants | $ 26,200 | $ 21,600 | $ 16,300 |  |  |  |  |  |  |  | $ 15,000
Increase in expected revenue from grants | $ 4,650 | $ 5,300 | $ 1,300 |  |  |  |  |  |  |  |
Government Assistance, Asset, Increase, Current, Statement of Financial Position [Extensible Enumeration] |  | Other Assets, Current |  |  |  |  |  |  |  |  |
Grant revenue from the MTEC Agreement |  |  |  |  |  | $ 1,200 | $ 3,000 | $ 3,800 | $ 3,900 |  |
Government Assistance, Income, Increase (Decrease), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  |  |  | Revenue Not from Contract with Customer | Revenue Not from Contract with Customer | Revenue Not from Contract with Customer | Revenue Not from Contract with Customer |  |
Grants receivable |  |  |  |  |  |  |  |  |  | $ 700 |
CFF Therapeutics Development Award |  |  |  |  |  |  |  |  |  |  |
Government Assistance [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grant revenue from the MTEC Agreement |  |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 |  |
Proceeds from governments grants |  |  |  |  | $ 1,000 |  |  |  |  |  |
Award agreement interruption period |  |  |  | 360 days |  |  |  |  |  |  |
CFF Therapeutics Development Award | Maximum |  |  |  |  |  |  |  |  |  |  |
Government Assistance [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from grants |  |  |  | $ 5,000 |  |  |  |  |  |  |

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