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License and Collaboration Agreements - License, Collaboration and Other Revenue (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
License And Collaboration Agreements [Line Items] |  |  |
License, collaboration and other revenue | $ 165,604 | $ 153,289 | $ 80,872
AstraZeneca AB [Member] | MOVANTIKTM (NKTR-118) and MOVANTIKTM fixed-dose combination program (NKTR-119) [Member] |  |  |
License And Collaboration Agreements [Line Items] |  |  |
License, collaboration and other revenue | 130,000 | 105,001 | 25,016
Roche [Member] | PEGASYS and MIRCERA [Member] |  |  |
License And Collaboration Agreements [Line Items] |  |  |
License, collaboration and other revenue | 12,816 | 12,845 | 18,382
Baxalta Incorporated [Member] | ADYNOVATETM [Member] |  |  |
License And Collaboration Agreements [Line Items] |  |  |
License, collaboration and other revenue | 10,694 | 10,258 | 1,702
Amgen, Inc. [Member] | Neulasta [Member] |  |  |
License And Collaboration Agreements [Line Items] |  |  |
License, collaboration and other revenue | 5,000 | 5,000 | 5,035
Bayer Healthcare LLC [Member] | BAY41-6551 (Amikacin Inhale) [Member] |  |  |
License And Collaboration Agreements [Line Items] |  |  |
License, collaboration and other revenue | 1,919 | 4,717 | 15,293
Affymax, Inc. [Member] | OMONTYS [Member] |  |  |
License And Collaboration Agreements [Line Items] |  |  |
License, collaboration and other revenue | 0 | 0 | 7,149
Other [Member] |  |  |
License And Collaboration Agreements [Line Items] |  |  |
License, collaboration and other revenue | $ 5,175 | $ 15,468 | $ 8,295

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- Definition Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Revenue may contain one or more of the following elements: upfront fees, contract research, milestone payments, manufacturing and supply, royalties, and license fees. + References No definition available. + Details
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