Collaboration and License Agreements (Tables)

3 Months Ended

Mar. 31, 2015

Revenue Recognition [Abstract]

Summary of Revenue from Collaboration and License Agreements

We have recognized revenue from our collaboration and license agreements as follows (in thousands):

	Three Months Ended March 31,
	2015		2014
BMS and Pfizer	$	380	$	442
Bayer and Janssen		799		913
Lee's Pharmaceutical		52		62
Daiichi Sankyo		1,128		955
Total collaboration and license revenue	$	2,359	$	2,372