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v3.25.3

Assets Held for Sale - Schedule of Assets and Liabilities Held for Sale (Parenthetical) (Details) $ in Thousands | Sep. 30, 2025 USD ($)
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Discontinued Operations and Disposal Groups [Abstract] |
Accumulated depreciation | $ 29,952

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- Definition Disposal group including discontinued operation accumulate depreciation. + References No definition available. + Details
Name: | agen_DisposalGroupIncludingDiscontinuedOperationAccumulateDepreciation
Namespace Prefix: | agen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration