Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 1,765	$ 2,681
Available-for-sale securities and certificate of deposit	350	515
Prepaid expenses and other current assets	21,082	2,625
Total current assets	23,197	5,821
Property and equipment - net	186,611	193,029
State research and development credit exchange receivable	293	473
Other assets	230	230
Total	210,331	199,553
Current liabilities:
Accounts payable	3,166	4,624
Accrued expenses and other current liabilities	48,598	20,736
Total current liabilities	51,764	25,360
Senior convertible notes	211,673	210,642
Note payable to related party	223,142	277,203
Total liabilities	486,579	513,205
Commitments and contingencies
Stockholders' deficit:
Undesignated preferred stock, $0.01 par value - 10,000,000 shares authorized; no shares issued or outstanding at September 30, 2012 and December 31, 2011
Common stock, $0.01 par value - 350,000,000 and 250,000,000 shares authorized at September 30, 2012 and December 31, 2011, respectively; 199,767,463 and 131,522,945 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively	1,998	1,315
Additional paid-in capital	1,774,893	1,620,535
Accumulated other comprehensive income (loss)	(8)	44
Deficit accumulated during the development stage	(2,053,131)	(1,935,546)
Total stockholders' deficit	(276,248)	(313,652)
Total	$ 210,331	$ 199,553