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License and Collaboration Agreements (Tables) | 6 Months Ended
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Jun. 30, 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):
|  |  |  | Three months ended June 30, |  |  |  | Six months ended June 30, |  |
Partner |  | Drug or Drug Candidate |  | 2020 |  | 2019 |  | 2020 |  | 2019
Bristol-Myers Squibb Company |  | Bempegaldesleukin |  | $ | 25,000 |  |  | $ | — |  |  | $ | 50,000 |  |  | $ | — |
Eli Lilly and Company |  | NKTR-358 |  | — |  |  | 1,200 |  |  | 1,259 |  |  | 3,700 |
Amgen, Inc. |  | Neulasta® |  | 1,250 |  |  | 1,250 |  |  | 2,500 |  |  | 2,500 |
Other |  |  |  | 25 |  |  | 85 |  |  | 31 |  |  | 539 |
License, collaboration and other revenue |  |  |  | $ | 26,275 |  |  | $ | 2,535 |  |  | $ | 53,790 |  |  | $ | 6,739 |
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 six months ended June 30, 2020 (in thousands):
| Six Months Ended June 30, 2020
Deferred revenue—December 31, 2019 | $ | 8,071 |
Recognition of previously unearned revenue | (3,790) |
Deferred revenue—June 30, 2020 | $ | 4,281 |

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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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