CONDENSED BALANCE SHEETS (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 206,395	$ 112,572
Marketable securities	39,103	136,796
Accounts receivable from Sanofi	74,788	79,603
Accounts receivable - other	3,659	13,509
Prepaid expenses and other current assets	15,927	15,142
Total current assets	339,872	357,622
Restricted cash and marketable securities	8,150	7,518
Marketable securities	258,073	370,053
Property, plant, and equipment, at cost, net of accumulated depreciation and amortization	363,913	347,450
Other assets	13,023	6,789
Total assets	983,031	1,089,432
Current liabilities
Accounts payable and accrued expenses	78,890	53,658
Deferred revenue from Sanofi, current portion	19,819	19,506
Deferred revenue - other, current portion	33,606	35,217
Facility lease obligations, current portion	920	675
Total current liabilities	133,235	109,056
Deferred revenue from Sanofi	88,033	97,081
Deferred revenue - other	166,623	188,775
Facility lease obligations	159,482	159,355
Other long term liabilities	7,405	7,350
Total liabilities	554,778	561,617
Commitments and contingencies
Stockholders' equity
Preferred stock	0	0
Common Stock	90	87
Additional paid-in capital	1,643,772	1,575,780
Accumulated deficit	(1,213,880)	(1,045,563)
Accumulated other comprehensive loss	(1,731)	(2,491)
Total stockholders' equity	428,253	527,815
Total liabilities and stockholders' equity	983,031	1,089,432
Class A Stock [Member]
Stockholders' equity
Common Stock	$ 2	$ 2