XML 66 R54.htm IDEA: XBRL DOCUMENT
v3.22.4

Stockholders' Equity - Schedule of Shares of Common Stock Reserved for Future Issuance (Details) shares in Thousands | Dec. 31, 2022 shares
--- | ---
Class of Stock [Line Items] |
Total common stock reserved for issuance | 27,403
2017 Performance Incentive Plan |
Class of Stock [Line Items] |
Total common stock reserved for issuance | 2,973
Employee Stock Purchase Plan |
Class of Stock [Line Items] |
Total common stock reserved for issuance | 841
Share-based Payment Arrangement, Option, RSUs And PSUs |
Class of Stock [Line Items] |
Total common stock reserved for issuance | 23,589

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 No definition available. + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_PlanNameAxis=nktr_TwoThousandSeventeenPerformanceIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=nktr_EmployeeStockPurchasePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=nktr_ShareBasedPaymentArrangementOptionRSUsAndPSUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |