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License, Clinical Trial and Sponsored Research Agreements (Tables) | 9 Months Ended
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Sep. 30, 2021
License Agreements [Member] |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |
Schedule of License, Clinical Trial and Sponsored Research Agreements | For the three and nine months ended September 30, 2021 and 2020, the Company recorded the following expense in research and development for licenses acquired: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended September 30, | ​ | For the nine months ended September 30,
($ in thousands) |  | 2021 |  | 2020 |  | 2021 |  | 2020
City of Hope National Medical Center | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
CD123 | ​ | $ | — | ​ | $ | — | ​ | $ | 250 | ​ | $ | 334
IL13Rα2 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 333
Spacer | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 333
PSCA | ​ | ​ | 250 | ​ | ​ | — | ​ | ​ | 250 | ​ | ​ | —
HER2 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 250
CSL Behring (Calimmune) | ​ | ​ | 30 | ​ | ​ | 170 | ​ | ​ | 30 | ​ | ​ | 170
Leiden University Medical Centre | ​ | ​ | 350 | ​ | ​ | — | ​ | ​ | 350 | ​ | ​ | —
Fred Hutchinson Cancer Research Center - CD20 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 300
Mayo Clinic | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 750 | ​ | ​ | —
SIRION Biotech LentiBOOSTTM | ​ | ​ | — | ​ | ​ | 117 | ​ | ​ | — | ​ | ​ | 117
Total | ​ | $ | 630 | ​ | $ | 287 | ​ | $ | 1,630 | ​ | $ | 1,837
Sponsored Research and Clinical Trial Agreements [Member] |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |
Schedule of License, Clinical Trial and Sponsored Research Agreements | For the three and nine months ended September 30, 2021 and 2020, the Company recorded the following expense in research and development for sponsored research and clinical trial agreements: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended September 30, | ​ | For the nine months ended September 30,
($ in thousands) |  | 2021 |  | 2020 |  | 2021 |  | 2020
City of Hope National Medical Center | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 500
CD123 | ​ | ​ | 24 | ​ | ​ | 48 | ​ | ​ | 250 | ​ | ​ | 344
IL13Rα2 | ​ | ​ | 199 | ​ | ​ | 96 | ​ | ​ | 992 | ​ | ​ | 422
CS1 | ​ | ​ | 138 | ​ | ​ | 65 | ​ | ​ | 510 | ​ | ​ | 835
HER2 | ​ | ​ | 319 | ​ | ​ | — | ​ | ​ | 473 | ​ | ​ | —
PSCA | ​ | ​ | 23 | ​ | ​ | — | ​ | ​ | 69 | ​ | ​ | —
Fred Hutchinson Cancer Research Center - CD20 | ​ | ​ | 492 | ​ | ​ | 418 | ​ | ​ | 1,490 | ​ | ​ | 1,134
St. Jude Children's Research Hospital - XSCID | ​ | ​ | 330 | ​ | ​ | 107 | ​ | ​ | 610 | ​ | ​ | 1,665
Mayo Clinic | ​ | ​ | 231 | ​ | ​ | — | ​ | ​ | 464 | ​ | ​ | —
Total | ​ | $ | 1,756 | ​ | $ | 734 | ​ | $ | 4,858 | ​ | $ | 4,900

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- Definition Tabular disclosure of collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 808 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434 + Details
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