CONDENSED BALANCE SHEETS (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 254,312	$ 112,572
Marketable securities	55,371	136,796
Accounts receivable from Sanofi	81,643	79,603
Accounts receivable - other	2,921	13,509
Prepaid expenses and other current assets	19,026	15,142
Total current assets	413,273	357,622
Restricted cash and marketable securities	8,165	7,518
Marketable securities	251,256	370,053
Property, plant, and equipment, at cost, net of accumulated depreciation and amortization	361,883	347,450
Other assets	12,287	6,789
Total assets	1,046,864	1,089,432
Current liabilities
Accounts payable and accrued expenses	81,665	53,658
Deferred revenue from Sanofi, current portion	19,720	19,506
Deferred revenue - other, current portion	33,606	35,217
Facility lease obligations, current portion	877	675
Total current liabilities	135,868	109,056
Deferred revenue from Sanofi	91,712	97,081
Deferred revenue - other	174,987	188,775
Facility lease obligations	159,457	159,355
Other long term liabilities	6,806	7,350
Total liabilities	568,830	561,617
Commitments and contingencies
Stockholders' equity
Preferred stock	0	0
Common Stock	89	87
Additional paid-in capital	1,630,362	1,575,780
Accumulated deficit	(1,151,515)	(1,045,563)
Accumulated other comprehensive loss	(904)	(2,491)
Total stockholders' equity	478,034	527,815
Total liabilities and stockholders' equity	1,046,864	1,089,432
Class A Stock [Member]
Stockholders' equity
Common Stock	$ 2	$ 2