XML 60 R40.htm IDEA: XBRL DOCUMENT
v3.20.4

Acquisitions - Intangibles Acquired and Weighted Average Useful Life (Details) - Pfenex $ in Thousands | Oct. 01, 2020 USD ($)
--- | ---
Business Acquisition [Line Items] |
Approximate Fair Value | $ 385,000
Contractual Relationships - Alvogen |
Business Acquisition [Line Items] |
Approximate Fair Value | $ 114,000
Estimated useful life (in years) | 12 years
Contractual Relationships - Merck |
Business Acquisition [Line Items] |
Approximate Fair Value | $ 117,000
Estimated useful life (in years) | 12 years
Contractual Relationships - Jazz |
Business Acquisition [Line Items] |
Approximate Fair Value | $ 80,000
Estimated useful life (in years) | 17 years
Contractual Relationships - SII |
Business Acquisition [Line Items] |
Approximate Fair Value | $ 49,000
Estimated useful life (in years) | 10 years
Contractual Relationships - Arcellx |
Business Acquisition [Line Items] |
Approximate Fair Value | $ 2,000
Estimated useful life (in years) | 17 years
Acquired Technologies |
Business Acquisition [Line Items] |
Approximate Fair Value | $ 23,000
Minimum | Acquired Technologies |
Business Acquisition [Line Items] |
Estimated useful life (in years) | 10 years
Maximum | Acquired Technologies |
Business Acquisition [Line Items] |
Estimated useful life (in years) | 19 years

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
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 No definition available. + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=lgnd_PfenexMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=lgnd_ContractualRelationshipsAlvogenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=lgnd_ContractualRelationshipsMerckMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=lgnd_ContractualRelationshipsJazzMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=lgnd_ContractualRelationshipsSIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=lgnd_ContractualRelationshipsArcellxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |