Related-Party Transactions (Tables)

9 Months Ended

Sep. 30, 2012

Related-Party Transactions [Abstract]

Revenues from GSK

The Company recognized the following revenues from GSK during the three and nine months ended September 30, 2012 and 2011 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
GSK:
Contract revenue	$	—	$	534	$	—	$	2,900
Recognition of up-front payments		1,128		907		3,274		2,721
Total revenues	$	1,128	$	1,441	$	3,274	$	5,621