Quarterly report pursuant to Section 13 or 15(d)

Collaboration and License Agreements and Supply Agreements - Additional Information (Details)

v3.21.1
Collaboration and License Agreements and Supply Agreements - Additional Information (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2020
USD ($)
Aug. 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Sep. 30, 2019
USD ($)
May 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Aug. 31, 2018
USD ($)
Jul. 31, 2018
Program
Sep. 30, 2017
USD ($)
Aug. 31, 2017
USD ($)
Program
Jun. 30, 2016
USD ($)
Mar. 31, 2015
USD ($)
Sep. 30, 2014
USD ($)
May 31, 2014
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Contingent payments of embedded derivative and related liability                               $ 100,000   $ 200,000
2019 EMD Serono Supply Agreement                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Deferred revenue                               1,000,000.0   1,000,000.0
Total revenue                               $ 100,000 $ 2,000,000.0  
The Leukemia & Lymphoma Society, Inc.                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Research development and commercialization agreement termination period                               12 years    
Research development and commercialization agreement termination description                               The LLS Agreement terminates upon the earlier of (a) fulfillment of all payment obligations by both parties or (b) 12 years after the effective date.  LLS may terminate the LLS Agreement at any time with 60 days’ prior written notice. Either the Company or LLS has the right to terminate the LLS Agreement based on the other party’s uncured material breach.    
BMS Agreement                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Number of programs advancing through preclinical development | Program                     4              
Upfront, nonrefundable payment received                           $ 83,100,000        
Contingent payment received                         $ 15,000,000.0          
Milestone payment received                       $ 25,000,000.0            
Additional milestone payment received                       $ 10,000,000.0            
Option fee payment received                     $ 12,500,000              
Milestone revenue recognized             $ 10,000,000.0     $ 10,000,000.0                
Contingent payments           $ 275,000,000.0                        
Option maintenance fee                     12,500,000              
Deferred revenue                     8,200,000         $ 0   0
Revenue, remaining performance obligation, amount                     20,700,000              
BMS Agreement | First Performance Obligation                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Revenue, remaining performance obligation, amount                     8,200,000              
BMS Agreement | Future Services on Collaboration Joint Steering Committee ("JSC")                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Revenue, remaining performance obligation, amount                     200,000              
BMS Agreement | Third Performance Obligation                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Revenue, remaining performance obligation, amount                     $ 12,300,000              
Partially Unsatisfied Performance Obligations                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Total revenue                               0 1,000,000.0  
Research and Development Services                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Total revenue                               300,000 100,000  
Research and Development Services | EMD Serono                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Total revenue                               200,000 300,000  
Research and Development Services | Vaxcyte                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Pass-through costs from CMOs                                   200,000
2018 BMS Master Services Agreement                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Deferred revenue                               2,500,000   1,200,000
Other revenue-related parties                               900,000 900,000  
2018 Merck Agreement                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Deferred revenue                               9,400,000   18,500,000
2018 Merck Agreement | Merck Sharp & Dohme Corp                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Number of research programs | Program                 3                  
Upfront payment received               $ 60,000,000.0               60,000,000.0    
Revenue from first performance obligation               7,300,000                    
Recognition of up front payment               47,100,000                    
Revenue performance obligation amounts recognized in revenues               700,000                    
Extension option fee associated with contingent program               4,900,000                    
Increase (decrease) in revenue     $ (5,100,000)                              
Embedded interest associated with upfront payment                               200,000 600,000  
FTE Funding Received                               1,200,000 1,300,000  
Revenue recognition aggregate contingent payments eligible to receive                               $ 500,000,000    
Milestone method revenue recognition description                               If one or more products from each of the target programs are developed for non-oncology or a single indication, the Company will be eligible for reduced aggregate milestone payments. In addition, the Company is eligible to receive tiered royalties ranging from mid-single digit to low teen percentages on the worldwide sales of any commercial products that may result from the collaboration.    
2018 Merck Agreement | Merck Sharp & Dohme Corp | First Target Program                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Increase (decrease) in revenue     (6,200,000)                              
2018 Merck Agreement | Merck Sharp & Dohme Corp | Second Target Program                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Increase (decrease) in revenue     1,100,000                              
2018 Merck Agreement | Merck Sharp & Dohme Corp | Partially Unsatisfied Performance Obligations                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Total revenue                               $ 9,100,000 900,000  
2018 Merck Agreement | Merck Sharp & Dohme Corp | Accounting Standards Update 2014-09                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Total interest of unearned revenue                               7,300,000    
First Cytokine-Derivative Program | Merck Sharp & Dohme Corp                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Upfront payment received     5,000,000.0                              
Recognition of up front payment     $ 50,500,000                           50,500,000  
Extended research term     1 year                              
Transaction price     $ 65,000,000.0 $ 60,000,000.0                            
Constrained variable consideration       $ 5,000,000.0                            
Revenue reallocated property rights     7,800,000                              
Incremental revenue recognized reallocated target programs     $ 500,000                              
Estimated service period     3 years                              
Incremental revenue recognized     $ 1,500,000                              
Adjustments to transaction price     $ 5,900,000                              
Cumulative catch-up in revenue                                 2,000,000.0  
2020 Merck Master Services Agreement                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Total revenue                               1,400,000    
Collaboration Agreement | EMD Serono                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Up-front, nonrefundable and non-creditable payment received                             $ 10,000,000.0      
MDA Agreement | EMD Serono                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Contingent payment received         $ 1,500,000                          
Milestone payment received $ 1,000,000.0                                  
Milestone revenue recognized   $ 1,000,000.0                                
Deferred revenue                               0   $ 0
Up-front, nonrefundable and non-creditable payment received                           $ 10,000,000.0        
Maximum amount eligible to receive for each product developed                               52,500,000    
Supply Agreement | Vaxcyte                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Total revenue                               $ 1,300,000 $ 36,000  
Research Development and Commercialization Agreement | The Leukemia & Lymphoma Society, Inc.                                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                                    
Milestone payment received               1,000,000.0                    
Maximum contribution in clinical development               6,000,000.0                    
Initial milestone payment               500,000                    
Maximum aggregate payment               $ 19,500,000