Annual report pursuant to Section 13 and 15(d)

License, Collaboration and Manufacturing Agreements - Additional Information (Detail)

v3.20.4
License, Collaboration and Manufacturing Agreements - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
License, Collaboration and Manufacturing Agreements [Line Items]      
Contractual obligations due to Bayer, MSK and QIMR   $ 0 $ 0
MSK Agreements      
License, Collaboration and Manufacturing Agreements [Line Items]      
Potential milestone payments payable   $ 33,000,000.0  
Payments for research and development $ 12,500,000