XML 79 R66.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Restructuring and Impairment - Sublease Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Restructuring Cost and Reserve [Line Items] |  |
Book value in excess of fair value |  | $ 35,328
Total impairment of right-of-use assets and property, plant and equipment | $ 8,329 | 35,328
Reported Value Measurement |  |
Restructuring Cost and Reserve [Line Items] |  |
Property, plant and equipment and operating lease right-of-use assets | 14,403 | 51,864
Property, Plant and Equipment |  |
Restructuring Cost and Reserve [Line Items] |  |
Book value in excess of fair value |  | 4,771
Total impairment of right-of-use assets and property, plant and equipment | 1,042 |
Property, Plant and Equipment | Reported Value Measurement |  |
Restructuring Cost and Reserve [Line Items] |  |
Property, plant and equipment and operating lease right-of-use assets | 1,897 | 6,943
Operating Lease Right-of-Use Assets |  |
Restructuring Cost and Reserve [Line Items] |  |
Book value in excess of fair value |  | 30,557
Total impairment of right-of-use assets and property, plant and equipment | 7,287 |
Operating Lease Right-of-Use Assets | Reported Value Measurement |  |
Restructuring Cost and Reserve [Line Items] |  |
Property, plant and equipment and operating lease right-of-use assets | 12,506 | 44,921
Fair Value, Level 3 | Estimate of Fair Value Measurement |  |
Restructuring Cost and Reserve [Line Items] |  |
Property, plant and equipment and operating lease right-of-use assets | (6,074) | (16,536)
Fair Value, Level 3 | Property, Plant and Equipment | Estimate of Fair Value Measurement |  |
Restructuring Cost and Reserve [Line Items] |  |
Property, plant and equipment and operating lease right-of-use assets | (855) | (2,172)
Fair Value, Level 3 | Operating Lease Right-of-Use Assets | Estimate of Fair Value Measurement |  |
Restructuring Cost and Reserve [Line Items] |  |
Property, plant and equipment and operating lease right-of-use assets | $ (5,219) | $ (14,364)

X
- Definition Property, plant and equipment, and operating lease right of use asset, book value in excess of fair value. + References No definition available. + Details
Name: | nktr_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetBookValueInExcessOfFairValue
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Property, Plant And Equipment, And Operating Lease Right Of Use Asset, Fair Value Disclosure + References No definition available. + Details
Name: | nktr_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetFairValueDisclosure
Namespace Prefix: | nktr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-2 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482130/360-10-45-4 + Details
Name: | us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=nktr_SubleasePropertyPlantAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=nktr_SubleaseOperatingLeaseRightOfUseAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |