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Note 13 - License and Collaboration Agreements (Details Textual) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2021 | Nov. 30, 2019 | Sep. 30, 2022
Agenus Inc. [Member] |  |  |
Payments for License Agreement |  | $ 10 |
License Agreement, Maximum Payable for Certain Clinical Development and Regulatory Milestones |  | 115 |
License Agreement, Maximum Payable for Certain Commercial Milestones |  | $ 85 |
License Agreement, Expiration Term (Year) |  | 15 years |
Agenus Inc. [Member] | Minimum [Member] |  |  |
License Agreement, Royalty, Percentage of Net Sales of Licensed Products |  | 14.00% |
Agenus Inc. [Member] | Maximum [Member] |  |  |
License Agreement, Royalty, Percentage of Net Sales of Licensed Products |  | 20.00% |
MD Anderson [Member] |  |  |
Collaboration Agreement, Term (Year) | 3 years |  |
Research and Development Arrangement, Contract to Perform for Others, Costs Incurred, Gross |  |  | $ 2

X
- Definition The term of the collaboration agreement. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition The expiration term of the license agreement. + References No definition available. + Details
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Balance Type: | na
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X
- Definition The maximum amount to be paid for certain clinical developments and regulatory milestones under the license agreement. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The maximum amount of to be paid upon achievement of certain commercial milestones. + References No definition available. + Details
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- Definition The percentage of net sales of licensed products to be paid as royalties under the license agreement. + References No definition available. + Details
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- Definition The amount of costs incurred under a research and development arrangement accounted for as a contract to perform research and development for others. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 20 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=6420387&loc=d3e23221-108380 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6420387&loc=d3e23199-108380 + Details
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- Details
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