XML 102 R46.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Liability Related to the Sale of Future Royalties - Summary of Liability Related to Potential Future Royalties (Detail) - USD ($) $ in Thousands | 12 Months Ended | 94 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2019
Liability Related To The Sale Of Future Royalties [Roll Forward] |  |  |  |
Liability related to the sale of future royalties—beginning balance | $ 84,810 |  |  | $ 0
Proceeds from sale of future royalties | 0 |  |  | 124,000
Payments from Nektar to RPI | 0 |  |  | (10,000)
Non-cash CIMZIA® and MIRCERA® royalty revenue | (36,303) | $ (33,308) | $ (30,531) | (207,142)
Non-cash interest expense recognized | 25,044 | 21,196 | $ 18,869 | 166,693
Liability related to the sale of future royalties – ending balance | 73,551 | 84,810 |  | 73,551
Less: unamortized transaction costs | (1,531) |  |  | (1,531)
Liability related to the sale of future royalties, net | $ 72,020 | $ 82,911 |  | $ 72,020

X
- Definition Liabilities on sale of future royalties, unamortized transaction costs. + References No definition available. + Details
Name: | nktr_LiabilitiesOnSaleOfFutureRoyaltiesUnamortizedTransactionCosts
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Liability related to sale of potential future royalties noncurrent. + References No definition available. + Details
Name: | nktr_LiabilityRelatedToSaleOfPotentialFutureRoyaltiesNonCurrent
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Liability related to sale of potential future royalties non current net of issuance costs. + References No definition available. + Details
Name: | nktr_LiabilityRelatedToSaleOfPotentialFutureRoyaltiesNonCurrentNetOfIssuanceCosts
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Liability Related To The Sale Of Future Royalties [Roll Forward] + References No definition available. + Details
Name: | nktr_LiabilityRelatedToTheSaleOfFutureRoyaltiesRollForward
Namespace Prefix: | nktr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Non-cash interest expense related to sale of royalties. + References No definition available. + Details
Name: | nktr_NonCashInterestExpenseRelatedToSaleOfRoyalties
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Non cash royalty revenue related to sale future royalties. + References No definition available. + Details
Name: | nktr_NonCashRoyaltyRevenueRelatedToSaleOfFutureRoyalties
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Partial repayment of royalty sale proceeds. + References No definition available. + Details
Name: | nktr_PartialRepaymentOfRoyaltySaleProceeds
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proceeds from sale of potential future royalties. + References No definition available. + Details
Name: | nktr_ProceedsFromSaleOfPotentialFutureRoyalties
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration