Collaboration Agreements - Summary of Collaboration Revenue (Details) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | ||
Collaboration revenue | $ 4,205 | $ 641 |
Deferred revenue | 0 | |
Takeda Collaboration Agreement | ||
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | ||
Collaboration revenue | 682 | 641 |
Sanofi Collaboration Agreement | ||
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | ||
Collaboration revenue | 3,523 | 0 |
Sanofi Collaboration Agreement | Alzheimer's Disease Services | ||
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | ||
Collaboration revenue | 94 | 0 |
Sanofi Collaboration Agreement | Retained Activities | ||
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | ||
Collaboration revenue | $ 3,429 | $ 0 |