XML 85 R69.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Subsequent Event - Additional Information (Detail) - Subsequent Event [Member] | Feb. 13, 2018 USD ($) $ / shares shares
--- | ---
Purchase Agreement [Member] |
Subsequent Event [Line Items] |
Shares expected to be issued in future period | shares | 8,284,600
Sale of stock consideration expected to be received in future period | $ 850,000,000
Issued price per share | $ / shares | $ 102.60
Subsequent event, description | The closings of the BMS Collaboration Agreement and the Purchase Agreement will be simultaneous and are expected to occur during the second quarter of 2018
NKTR-214 [Member] | Nektar's [Member] |
Subsequent Event [Line Items] |
Global commercialization profits and losses sharing percentage | 65.00%
NKTR-214 [Member] | Bristol-Myers Squibb [Member] |
Subsequent Event [Line Items] |
Non-refundable upfront payment to be received in cash in future period | $ 1,000,000,000
Global commercialization profits and losses sharing percentage | 35.00%
NKTR-214 [Member] | Maximum [Member] | Bristol-Myers Squibb [Member] |
Subsequent Event [Line Items] |
Maximum total additional cash payments receivable upon achievement of certain development and regulatory milestones | $ 1,430,000,000
Eligible additional cash payments receivable upon achievement of certain sales milestones | $ 350,000,000

X
- Definition Collaborative arrangements maximum aggregate additional cash payments receivable upon achievement of development and regulatory milestones. + References No definition available. + Details
Name: | nktr_CollaborativeArrangementsMaximumAggregateAdditionalCashPaymentsReceivableUponAchievementOfDevelopmentAndRegulatoryMilestones
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Eligible additional cash payments receivable upon achievement of certain sales milestones. + References No definition available. + Details
Name: | nktr_EligibleAdditionalCashPaymentsReceivableUponAchievementOfCertainSalesMilestones
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Non-refundable upfront payment to be received in cash in future period. + References No definition available. + Details
Name: | nktr_NonRefundableUpfrontPaymentToBeReceivedInCashInFuturePeriod
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Profits and losses sharing percentage. + References No definition available. + Details
Name: | nktr_ProfitsAndLossesSharingPercentage
Namespace Prefix: | nktr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sale of stock consideration expected to be received in future period. + References No definition available. + Details
Name: | nktr_SaleOfStockConsiderationExpectedToBeReceivedInFuturePeriod
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Describes the event or transaction that occurred between the balance sheet date and the date the financial statements are issued or available to be issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662 + Details
Name: | us-gaap_SubsequentEventDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=nktr_SharePurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=nktr_NektarTwoOneFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=us-gaap_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=nktr_BristolMyersSquibbCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |