The following table summarizes research and development expenses incurred by the Company and funding provided to Agensys under the collaboration to achieve equal cost sharing.
| Years ended December 31, | ||||||||||||
| 2013 | 2012 | 2011 | ||||||||||
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Research and development expense using contractual rates |
$ | 2,574 | $ | 4,885 | $ | 6,404 | ||||||
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Co-development funding due to Agensys |
8,096 | 5,484 | 6,844 | |||||||||
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Total |
$ | 10,670 | $ | 10,369 | $ | 13,248 | ||||||
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