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Collaboration Agreements (Tables) | 6 Months Ended
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Jun. 30, 2019
Japan [Member] |
Summary of Revenue Recognized under Agreement | Amounts recognized as revenue under the Japan Agreement were as follows (in thousands):
|  |  |  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
Agreement |  | Performance Obligation |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Japan |  | License revenue |  | $ | — |  |  | $ | 14,323 |  |  | $ | — |  |  | $ | 14,323 |
|  | Development revenue |  | $ | 369 |  |  | $ | 1,142 |  |  | $ | 615 |  |  | $ | 1,591 |
Transaction Price Related to Consideration Received and Accounts Receivable Allocated to Performance Obligations along with Associated Deferred Revenue | The transaction price related to consideration received and accounts receivable has been allocated to each of the following performance obligations under the Japan Agreement, along with any associated deferred revenue as follows (in thousands):
Japan Agreement |  | Cumulative Revenue Through June 30, 2019 |  |  | Deferred Revenue at June 30, 2019 |  |  | Total Consideration Through June 30, 2019 |
License |  | $ | 74,089 |  |  | $ | — |  |  | $ | 74,089 |
Development revenue |  |  | 14,523 |  |  |  | 136 |  |  |  | 14,659 |
Total license and development revenue |  | $ | 88,612 |  |  | $ | 136 |  |  | $ | 88,748 |
Europe [Member] |
Summary of Revenue Recognized under Agreement | Amounts recognized as revenue under the Europe Agreement were as follows (in thousands):
|  |  |  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
Agreement |  | Performance Obligation |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Europe |  | License revenue |  | $ | 117,470 |  |  | $ | — |  |  | $ | 117,470 |  |  | $ | — |
|  | Development revenue |  | $ | 16,854 |  |  | $ | 5,003 |  |  | $ | 21,467 |  |  | $ | 9,726 |
Transaction Price Related to Consideration Received and Accounts Receivable Allocated to Performance Obligations along with Associated Deferred Revenue | The transaction price related to consideration received and accounts receivable has been allocated to each of the following performance obligations under the Europe Agreement, along with any associated deferred revenue as follows (in thousands):
Europe Agreement |  | Cumulative Revenue Through June 30, 2019 |  |  | Deferred Revenue at June 30, 2019 |  |  | Total Consideration Through June 30, 2019 |
License |  | $ | 487,951 |  |  | $ | — |  |  | $ | 487,951 |
Development revenue |  |  | 224,304 |  |  |  | 2,019 |  |  |  | 226,323 |
Total license and development revenue |  | $ | 712,255 |  |  | $ | 2,019 |  | * | $ | 714,274 |
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* | Contract assets and liabilities related to rights and obligations in the same contract are recorded net on the condensed consolidated balance sheets. As of June 30, 2019, prepaid expenses and other current assets included a net unbilled contract asset of $128.0 million related to the Europe Agreement, which represents the net of the above-mentioned unbilled contract asset of $130.0 million, and $2.0 million of deferred revenue presented above.
U.S./RoW and China [Member] |
Summary of Revenue Recognized under Agreement | Amounts recognized as revenue under the U.S./RoW Agreement were as follows (in thousands):
|  |  |  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
Agreement |  | Performance Obligation |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
U.S. / RoW and China |  | License revenue |  | $ | 33,111 |  |  | $ | — |  |  | $ | 33,111 |  |  | $ | — |
|  | Development revenue |  |  | 23,762 |  |  |  | 23,479 |  |  |  | 42,766 |  |  |  | 50,202 |
|  | China performance obligation |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Transaction Price Related to Consideration Received and Accounts Receivable Allocated to Performance Obligations along with Associated Deferred Revenue | The transaction price related to consideration received and accounts receivable has been allocated to each of the following performance obligations under the U.S./RoW Agreement and China Agreement, along with any associated deferred revenue as follows (in thousands):
U.S. / RoW and China Agreements |  | Cumulative Revenue Through June 30, 2019 |  |  | Deferred Revenue at June 30, 2019 |  |  | Total Consideration Through June 30, 2019 |
License |  | $ | 327,275 |  |  | $ | — |  |  | $ | 327,275 |
Co-development, information sharing & committee services |  |  | 451,402 |  |  |  | 16,342 |  |  |  | 467,744 |
China performance obligation |  |  | — |  |  |  | 136,584 |  |  |  | 136,584 |
Total license and development revenue |  | $ | 778,677 |  |  | $ | 152,926 |  | * | $ | 931,603 |
_______________________________________________________________________________________________________
* | Contract assets and liabilities related to rights and obligations in the same contract are recorded net on the condensed consolidated balance sheets. As of June 30, 2019, long-term deferred revenue included $102.9 million related to the U.S./RoW and China Agreement, which represents the net of $152.9 million of deferred revenue presented above and the above-mentioned $50.0 million unbilled contract asset.

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