Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating (income) expenses:
Collaborative	$ 697	$ 3,674	$ 7,174	$ 4,694
Total revenue	9,959	18,416	42,885	46,946
Research and development	4,045	2,673	11,086	7,593
Selling, general and administrative	4,744	4,940	15,100	14,106
Total operating expenses	15,510	16,331	18,881	50,813
Net loss (income) from discontinued operations	(23)	(24)	(49)	37
Revenue From Discontinued Operations [Member]
Operating (income) expenses:
Grant	0	0	0	0
Collaborative	0	0	0	(23)
Total revenue	0	0	0	(23)
Discontinued Operations of Operating Expenses [Member]
Operating (income) expenses:
Research and development	0	(10)	0	(29)
Selling, general and administrative	23	34	49	(31)
Total operating expenses	$ 23	$ 24	$ 49	$ (60)