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Collaboration Agreements - Takeda Collaboration (Details) - Collaborative Arrangement with Takeda - USD ($)
$ in Millions
Apr. 29, 2019
Apr. 28, 2019
Jun. 28, 2019
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Limit on reimbursement per year $ 1.0    
Increase in maximum amount eligible for development and regulatory milestones 12.0    
Maximum amount eligible for development and regulatory milestones 102.0    
Milestone Payments Earned 16.0 $ 10.0  
Increase in maximum amount eligible for commercial milestones under collaborations agreement 6.0    
Maximum amount eligible for commercial milestones under collaborations agreement $ 89.0    
Remaining performance obligation     $ 19.2
Net contract liability     $ 8.5