Legal Proceedings, Commitments and Contingencies - Additional Information (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2015
USD ($)
Building
RenewalOption
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
|
| Commitments And Contingencies [Line Items] | |||
| Estimate of milestone payments | $ 57.7 | ||
| Operating leases, number of successive renewal options | RenewalOption | 2 | ||
| Operating leases, extended lease term | 5 years | ||
| Operating leases, total rental expense | $ 3.7 | $ 3.5 | $ 3.5 |
| Capital leases, lease term | 3 years | ||
| Agenus West, LLC [Member] | |||
| Commitments And Contingencies [Line Items] | |||
| Operating leases, sublease commencement date | Dec. 31, 2015 | ||
| Operating leases, sublease expiration date | Dec. 31, 2016 | ||
| Operating leases sublease income | $ 0.3 | ||
| Operating leases, number of portions of leased buildings | Building | 2 | ||
| X | ||||||||||
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. No definition available.
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| X | ||||||||||
- Definition Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
- Definition The amount of revenue recognized for the period under subleasing arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Capital leases lease term. No definition available.
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| X | ||||||||||
- Definition Commitments and contingencies. No definition available.
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| X | ||||||||||
- Definition Reflects estimated obligations that are due and payable upon achievement of certain criteria categorized as developmental, regulatory, or commercial milestones. No definition available.
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| X | ||||||||||
- Definition Operating leases, number of successive renewal options. No definition available.
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| X | ||||||||||
- Definition Operating leases, sublease commencement date. No definition available.
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| X | ||||||||||
- Definition Date which sublease or group of subleases is set to expire, in CCYY-MM-DD format. No definition available.
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| X | ||||||||||
- Definition The number of portions (items of property) under operating sublease arrangements. No definition available.
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| X | ||||||||||
- Details
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