XML 55 R44.htm IDEA: XBRL DOCUMENT v3.20.2
License, Acquisition and Collaboration Agreements - Regeneron License Agreement (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2017
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
License and Acquisition Agreements          
Research and development   $ 22,324 $ 30,848 $ 43,225 $ 90,101
Regeneron | License Agreement          
License and Acquisition Agreements          
Upfront payment for exchange of rights $ 5,000        
Uncured period which causes termination of the agreement, due to insolvency or bankruptcy or for material breach of the agreement by the other party that remains uncured 90 days        
Research and development   0 0 0 0
Notice period to terminate the agreement under payment-related breaches 30 days        
Consecutive suspension of activities period for termination of agreement 12 months        
Period after which the agreement can be terminated 18 months        
Notice period to terminate the agreement 180 days        
Notice period to terminate the agreement after US marketing approval of the developed product 1 year        
Notice period to terminate the agreement if products are having safety concerns 3 months        
Regeneron | Clinical Supply Agreement          
License and Acquisition Agreements          
Research and development expense related to purchase of drug materials   $ 0 $ 3,127 $ 0 $ 3,642
Maximum | Regeneron | License Agreement          
License and Acquisition Agreements          
Milestone payment to be paid upon regulatory milestone achievement $ 27,500