XML 32 R20.htm IDEA: XBRL DOCUMENT
v3.21.1

Collaborative Arrangements and Licensing Agreements (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Biogen [Member] |
Collaborative Arrangements and Licensing Agreements [Abstract] |
Revenue from Collaborative Relationship | During the three months ended March 31, 2021 and 2020, we earned the following revenue from our relationship with Biogen (in millions, except percentage amounts):
|  | Three Months Ended March 31, |
|  | 2021 |  |  | 2020 |
SPINRAZA royalties (commercial revenue) |  | $ | 60.0 |  |  | $ | 66.0 |
R&D revenue |  |  | 18.1 |  |  |  | 21.4 |
Total revenue from our relationship with Biogen |  | $ | 78.1 |  |  | $ | 87.4 |
Percentage of total revenue |  |  | 70 | % |  |  | 66 | %

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: | ions_CollaborativeArrangementsAndNonCollaborativeArrangementTransactionsDisclosureLineItems
Namespace Prefix: | ions_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6327-108592 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6442-108592 + Details
Name: | us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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