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MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - Kite Pharma, Inc. (Detail) - Kite Pharma, Inc. - Collaboration And License Agreement $ in Millions | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 USD ($) | Apr. 30, 2018 USD ($) milestone | Sep. 30, 2021 USD ($) option | Dec. 31, 2020 USD ($)
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |
Milestone payments received |  | $ 150.0 |  |
Development and sales-based milestone payments to be received |  | 3,010.0 |  |
Initial research term of agreement |  |  | 6 years |
Number of options to extend initial research term | option |  |  | 2 |
Extended research term of agreement |  |  | 1 year |
Separate upfront fee |  |  | $ 10.0 |
Collaborative arrangement estimated reimbursable service costs for new research plan | $ 3.4 |  |  |
Collaborative arrangement transaction price | $ 189.3 |  |  |
Revenues under agreement |  |  | 150.0 |
Collaborative arrangement estimated reimbursable service costs |  |  | 39.3 |
Deferred revenue |  |  | $ 62.8 | $ 81.4
Achievement of specified research, clinical development, regulatory and first commercial sale milestones |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |
Contingent development - and sales-based milestone payments to be received |  | 1,260.0 |  |
Achievement of specified sales-based milestones if annual worldwide net sales of licensed products reach specified levels |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |
Contingent development - and sales-based milestone payments to be received |  | $ 1,750.0 |  |
Maximum amount of achieved milestones to receive payment | milestone |  | 10 |  |

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