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License, Clinical Trial and Sponsored Research Agreements (Sponsored Research and Clinical Trial Agreements) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development - licenses acquired | $ 861,000 | $ 527,000
Research and development expense | 243,000 | 4,162,000
Nationwide children hospital | License agreements |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development - licenses acquired | 300,000 |
CSL Behring (Calimmune) | License agreements |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development - licenses acquired |  | 50,000
City of Hope National Medical Center | CD123 |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development expense |  | 23,000
City of Hope National Medical Center | IL13Ra2 |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development expense | 427,000 | 1,115,000
City of Hope National Medical Center | CS1 |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development expense |  | 188,000
City of Hope National Medical Center | PSCA |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development expense |  | 44,000
Fred Hutchinson Cancer Center - CD20 |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development expense | 312,000 | 1,254,000
St. Jude Children's Research Hospital - XSCID |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development expense | (434,000) | 637,000
Leiden University Medical Center - RAG1 SCID |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development expense | 213,000 | 350,000
Mayo Clinic |  |
License, Clinical Trial and Sponsored Research Agreements |  |
Research and development expense | $ (275,000) | $ 551,000

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