Quarterly report pursuant to Section 13 or 15(d)

Subsequent Event (Details)

v2.4.1.9
Subsequent Event (Details) (Subsequent Event, USD $)
In Millions, unless otherwise specified
0 Months Ended
May 11, 2015
program
Subsequent Event
 
Subsequent Event [Line Items]  
Number of rights to biologic development programs 15lgnd_NumberofIntangibleAssetsAcquired
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Payments to acquire rights to biologic development programs $ 4.0us-gaap_PaymentsToAcquireIntangibleAssets
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember