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COLLABORATION AGREEMENTS (Details) (License agreements, USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 2 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Medarex Maximum | Dec. 31, 2013 Rockefeller Maximum | Dec. 31, 2013 Duke Maximum | Dec. 31, 2013 Ludwig Maximum | Dec. 31, 2013 Alteris Maximum | Dec. 31, 2013 Southampton Maximum | Dec. 31, 2013 Amgen Maximum | Feb. 28, 2014 Seattle Genetics CuraGen Subsequent event | Dec. 31, 2013 Seattle Genetics CuraGen Maximum
Collaborative Agreements |  |  |  |  |  |  |  |  |  |  |  |
Nonrefundable license fee expense | $ 0.7 | $ 0.7 | $ 1.4 |  |  |  |  |  |  |  |  |
Period from the first commercial sale of licensed product for royalty payment |  |  |  | 10 years |  |  |  |  |  |  |  |
Milestone payment due |  |  |  | 7.0 | 3.9 | 0.7 | 1.0 | 5.0 | 1.4 | 1.0 |  | 5.0
Payment made in connection with initiation of METRIC |  |  |  |  |  |  |  |  |  |  | $ 2.5 |

X
- Definition Represents the amount of payment made in connection with the initiation of METRIC, based on the terms of the collaborative arrangement. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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X
- Definition Represents the period from the first commercial sale of licensed product for royalty payment under the collaborative arrangement. + References No definition available. + Details
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Namespace Prefix: | cldx_
Data Type: | xbrli:durationItemType
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X
- Definition Represents the total amount of potential milestone payments to be made by the entity based on terms of the collaborative arrangement. + References No definition available. + Details
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Namespace Prefix: | cldx_
Data Type: | xbrli:monetaryItemType
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X
- Definition Represents the amount of nonrefundable license fee expense. + References No definition available. + Details
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Namespace Prefix: | cldx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Details
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