XML 61 R36.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Fair Value Measurements - Additional Information (Details) | Dec. 31, 2021
--- | ---
Voyager | Collaborative Arrangement |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Discount for marketability in valuation analysis | 2.50%

X
- Definition Discount For Marketability Used In Valuation Analysis + References No definition available. + Details
Name: | nbix_DiscountForMarketabilityUsedInValuationAnalysis
Namespace Prefix: | nbix_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CounterpartyNameAxis=nbix_VoyagerTherapeuticsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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