XML 41 R30.htm IDEA: XBRL DOCUMENT
v3.23.2

Basis of Presentation and Summary of Significant Accounting Policies - Accounting for Share-Based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Basis of Presentation [Line Items] |  |  |  |
Share-based compensation expense | $ 7,207 | $ 7,001 | $ 13,138 | $ 14,110
SBC - Research and development expenses |  |  |  |
Basis of Presentation [Line Items] |  |  |  |
Share-based compensation expense | 2,016 | 2,447 | 3,723 | 4,643
SBC - General and administrative expenses |  |  |  |
Basis of Presentation [Line Items] |  |  |  |
Share-based compensation expense | $ 5,191 | $ 4,554 | $ 9,415 | $ 9,467

X
- Definition Basis of presentation. + References No definition available. + Details
Name: | lgnd_BasisOfPresentationLineItems
Namespace Prefix: | lgnd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after tax, of expense for award under share-based payment arrangement. + References No definition available. + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |