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Collaboration and License Agreement - Additional Information (Details) - Bristol-Myers Squibb Company - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | May 31, 2020 | Jun. 30, 2021 | Jun. 30, 2021 | Aug. 12, 2021 | Jul. 31, 2021 | Dec. 31, 2020
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Non-refundable upfront payment received |  |  | $ 50,000,000 | $ 50,000,000 |  |  |
Collaboration and License Agreement |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Collaboration term expiration period |  | 42 months |  |  |  |  |
Initial nonrefundable upfront fee received | $ 50,000,000.0 |  |  |  |  |  |
Non-refundable upfront payment received |  | $ 50,000,000.0 |  |  |  |  |
Deferred revenue recognized |  |  | 300,000 | 400,000 |  |  |
Deferred revenue |  |  | 49,500,000 | 49,500,000 |  |  | $ 49,900,000
Deferred revenue, current |  |  | 8,800,000 | 8,800,000 |  |  | 2,100,000
Deferred revenue, noncurrent |  |  | $ 40,700,000 | $ 40,700,000 |  |  | $ 47,800,000
Collaboration and License Agreement | Subsequent Events | Reclassification Adjustment |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Deferred revenue, current |  |  |  |  | $ 6,200,000 | $ 6,200,000 |
Deferred revenue, noncurrent |  |  |  |  | $ (6,200,000) | $ (6,200,000) |
Collaboration and License Agreement | Maximum |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Milestone payments entitled to be received |  | 301,000,000.0 |  |  |  |  |
Collaboration and License Agreement | Maximum | Research, Development and Regulatory Milestones |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Milestone payments entitled to be received |  | 176,000,000.0 |  |  |  |  |
Collaboration and License Agreement | Maximum | Commercial Milestones |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Milestone payments entitled to be received |  | $ 125,000,000.0 |  |  |  |  |

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