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Collaboration and Other Agreements - Incyte Corporation (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended | 24 Months Ended | 39 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2017 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2020
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |
Revenues |  | $ 104,883 | $ 64,188 | $ 60,121 |  |
Incyte MGA012 Agreement | Incyte Corporation (Incyte) |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |
Amounts recognized |  | 40,000 |  | 15,000 |  | $ 55,000
Amount of development progress recognized |  |  |  |  |  | $ 10,000
Transaction price | $ 154,000 |  |  |  |  |
Clinical trial activities selling price amount |  |  |  |  | $ 4,000 |
Maximum | Incyte MGA012 Agreement | Incyte Corporation (Incyte) |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |
Potential development and regulatory milestone payments | 420,000 |  |  |  |  |
Potential commercial milestone payments | $ 330,000 |  |  |  |  |
Potential proceeds from royalties percent | 24.00% |  |  |  |  |
Minimum | Incyte MGA012 Agreement | Incyte Corporation (Incyte) |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |
Potential proceeds from royalties percent | 15.00% |  |  |  |  |
Revenues From License Agreements | Incyte MGA012 Agreement | Incyte Corporation (Incyte) |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |
Revenues | $ 150,000 | 40,000 | 100 | 18,800 |  |
Revenues From License Agreements | Incyte MGA012 Clinical Services | Incyte Corporation (Incyte) |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |
Revenues |  | 8,600 | $ 22,100 | $ 22,200 |  |
Revenues From License Agreements | Incyte MGA012 Supply Agreement | Incyte Corporation (Incyte) |  |  |  |  |  |
Collaboration and Other Agreements [Line Items] |  |  |  |  |  |
Revenues |  | $ 1,400 |  |  |  |

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