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License and Collaboration Agreements (Tables) | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
License, Collaboration and Other Revenue | In accordance with our collaboration agreements, we recognized license, collaboration and other revenue as follows (in thousands):
|  |  |  | Year Ended December 31,
Partner |  | Agreement |  | 2020 |  | 2019 |  | 2018
Bristol-Myers Squibb |  | Bempegaldesleukin |  | $ | 50,000 |  |  | $ | — |  |  | $ | 1,059,768 |
Eli Lilly and Company |  | NKTR-358 |  | 1,259 |  |  | 7,019 |  |  | 11,634 |
Amgen, Inc. |  | Neulasta® |  | 4,167 |  |  | 5,000 |  |  | 5,000 |
Baxalta Incorporated / Takeda |  | Hemophilia, including ADYNOVATE® and ADYNOVI® |  | 346 |  |  | 378 |  |  | 20,328 |
Other |  |  |  | 77 |  |  | 4,578 |  |  | 535 |
License, collaboration and other revenue |  |  |  | $ | 55,849 |  |  | $ | 16,975 |  |  | $ | 1,097,265 |
Changes in Deferred Revenue Balance from Collaboration Agreements | The following table presents the changes in our deferred revenue balance from our collaboration agreements during the year ended December 31, 2020 (in thousands):
| For the year ended December 31, 2020
Deferred revenue—December 31, 2019 | $ | 8,071 |
Recognition of previously unearned revenue | (5,516) |
Deferred revenue—December 31, 2020 | $ | 2,555 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 808 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434 + Details
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