Threshold amount protection for warrant holder.

No definition available.

Name:	agen_ThresholdAmountProtectionForWarrantHolder
Namespace Prefix:	agen_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Topic 835
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Period Type:	duration

- Details

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- Details

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Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
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Subsequent Events (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions				2 Months Ended
	Feb. 20, 2025	Nov. 30, 2022	Nov. 29, 2022	Mar. 14, 2025	Nov. 26, 2024	Feb. 20, 2015
Subsequent Event [Line Items]
Class of warrant or right, exercise price of warrants or rights		$ 56.8
Senior Subordinated Notes [Member] \| Notes 2015 [Member]
Subsequent Event [Line Items]
Debt instrument, face amount						$ 14.0
Debt Instrument, Maturity Date		Feb. 20, 2025	Feb. 20, 2023
Debt instrument, interest rate, stated percentage						8.00%
Promissory Note [Member]
Subsequent Event [Line Items]
Debt instrument, face amount					$ 22.0
Debt instrument, interest rate, stated percentage					12.00%
Subsequent Event [Member] \| At Market Issuance Sales Agreement [Member]
Subsequent Event [Line Items]
Net proceeds from issuance of common stock				$ 4.4
Subsequent Event [Member] \| Senior Subordinated Notes [Member]
Subsequent Event [Line Items]
Warrants issued to purchase shars of common stock	67,500
Class of warrant or right, exercise price of warrants or rights	$ 3.25
Threshold amount protection for warrant holder	$ 10.0
Subsequent Event [Member] \| Senior Subordinated Notes [Member] \| Notes 2015 [Member]
Subsequent Event [Line Items]
Debt instrument, face amount	$ 10.5
Debt Instrument, Maturity Date	Jul. 20, 2026
Debt instrument, interest rate, stated percentage	9.00%
Subsequent Event [Member] \| Senior Subordinated Notes [Member] \| A Warrants and B Warrants [Member]
Subsequent Event [Line Items]
Warrants issued to purchase shars of common stock	97,500
Class of warrant or right, exercise price of warrants or rights	$ 3.25
Subsequent Event [Member] \| Maximum [Member] \| Senior Subordinated Notes [Member]
Subsequent Event [Line Items]
Class of warrant or right, exercise price of warrants or rights	$ 3.25