Quarterly report pursuant to Section 13 or 15(d)

Clinical Trial and Sponsored Research Agreements (Other - Sponsored Research and Clinical Trial Agreements) (Narrative) (Details)

v3.22.2.2
Clinical Trial and Sponsored Research Agreements (Other - Sponsored Research and Clinical Trial Agreements) (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 08, 2021
Jul. 03, 2017
Jan. 31, 2022
Jun. 30, 2021
Nov. 30, 2020
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Research and development expense           $ 15,419 $ 14,083 $ 46,872 $ 36,603
Sponsored Research and Clinical Trial Agreements [Member]                  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Research and development expense           1,836 1,756 4,884 4,858
Fred Hutchinson Cancer Center [Member] | Sponsored Research and Clinical Trial Agreements [Member] | CD20 (MB-106) [Member]                  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Milestones payable   $ 5,300              
Additional milestone payments     $ 2,200   $ 1,800        
Research and development expense           132 492 978 1,490
St. Jude Children's Research Hospital [Member] | Sponsored Research and Clinical Trial Agreements [Member] | ST. Jude - XSCID [Member]                  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Research and development expense           184 330 402 610
Mayo Clinic [Member]                  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Upfront fees paid           0 800 0 800
Mayo Clinic [Member] | Sponsored Research and Clinical Trial Agreements [Member]                  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Research and development expense           269 231 731 464
Mayo Clinic [Member] | Sponsored Research and Clinical Trial Agreements [Member] | Car T Technology [Member]                  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Milestones payable       $ 2,100          
Agreement term       2 years          
Leiden University Medical Centre [Member]                  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Upfront fees paid           0 400 0 400
Leiden University Medical Centre [Member] | Sponsored Research and Clinical Trial Agreements [Member] | RAG1 SCID (MB-110) [Member]                  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Annual maintenance fee payable $ 500                
Research and development expense           $ 92 $ 0 $ 357 $ 0
Agreement term 5 years