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Royalty Revenue from Stivarga (Details) (USD $)	3 Months Ended
Royalty Revenue from Stivarga (Details) (USD $)	Mar. 31, 2013
Revenue from Collaboration Agreement
Royalty revenue	$ 9,177,000
Bayer
Revenue from Collaboration Agreement
Fee earned for fee-for-service arrangement	1,600,000
Bayer \| Stivarga
Revenue from Collaboration Agreement
Royalty revenue	9,200,000
Royalty payment percentage	20.00%
Obligation to pay past or future development and commercialization costs	$ 0

- Definition

The amount of compensation earned (contract income) under a research and development arrangement accounted for as a contract to perform research and development for others.

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