Annual report pursuant to Section 13 and 15(d)

License, Clinical Trial and Sponsored Research Agreements (Sponsored Research and Clinical Trial Agreements) (Details)

v3.21.1
License, Clinical Trial and Sponsored Research Agreements (Sponsored Research and Clinical Trial Agreements) (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense $ 37,237,000 $ 30,042,000
Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 7,717,000 6,143,000
City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 500,000 2,000,000
CD123 Product or Process [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 433,000 1,202,000
IL13Ra2 Product [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 530,000 876,000
CS1 Product or Process [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 885,000 0
HER2 Product or Process [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 1,519,000 0
PSCA Product or Process [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 204,000 0
Manufacturing [Member] | City of Hope National Medical Center ("COH") [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 0 457,000
Manufacturing [Member] | Fred Hutchinson Cancer Research Center [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 0 200,000
CD20 Product or Process [Member] | Fred Hutchinson Cancer Research Center [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 1,804,000 762,000
ST. Jude - XSCID [Member] | St. Jude Children's Research Hospital [Member] | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense 1,842,000 777,000
CRISPR [Member] | Beth Israel Deaconess Medical Center - CRISPR | Sponsored Research and Clinical Trial Agreements [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Research and development expense $ 0 $ 69,000