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Collaboration and Other Agreements, Servier (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2012 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ 25,192 | $ 18,741 | $ 10,593 | $ 9,662 | $ 15,794 | $ 20,798 | $ 18,834 | $ 4,695 | $ 64,188 | $ 60,121 | $ 157,742 |
Deferred revenue |  |  |  |  |  | 40,722 |  |  |  |  | 40,722 | 27,318 |
Servier | Servier DART |  |  |  |  |  |  |  |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Non-refundable upfront payment | $ 20,000 |  |  |  |  |  |  |  |  |  |  |  |
Milestone payment removed | $ 5,000 |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  | 1,000 |  |  |  |  |  |  |  | 1,000 |  |  |
Deferred revenue, current |  | $ 1,000 |  |  |  |  |  |  |  | 1,000 |  |  |
Option exercise fee |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,000
Offset to research and development costs under collaboration arrangement |  |  |  |  |  |  |  |  |  | 3,600 | 6,000 | 3,200 |
Revenues From License Agreements | Servier | Servier DART |  |  |  |  |  |  |  |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 11,600 | 1,200 | 1,400 |
Revenues From License Agreements | Servier | Servier Agreement - MGD007 Option |  |  |  |  |  |  |  |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | $ 0 | 1,900 | $ 1,100 |
Deferred revenue |  |  |  |  |  | $ 0 |  |  |  |  | $ 0 |  |

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