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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 31,639 $ 2,681
Available for sale securities and certificate of deposit 350 515
Prepaid expenses and other current assets 18,356 2,625
Total current assets 50,345 5,821
Property and equipment - net 189,159 193,029
State research and development credit exchange receivable 658 473
Other assets 230 230
Total 240,392 199,553
Current liabilities:    
Accounts payable 5,817 4,624
Accrued expenses and other current liabilities 49,624 20,736
Total current liabilities 55,441 25,360
Senior convertible notes 211,184 210,642
Note payable to related party 218,142 277,203
Total liabilities 484,767 513,205
Commitments and contingencies      
Stockholders' deficit:    
Undesignated preferred stock, $0.01 par value - 10,000,000 shares authorized; no shares issued or outstanding at June 30, 2012 and December 31, 2011      
Common stock, $0.01 par value 350,000,000 and 250,000,000 shares authorized at June 30, 2012 and December 31, 2011, respectively; 199,300,833 and 131,522,945 shares issued and outstanding at June 30, 2012 and December 31, 2011, respectively 1,993 1,315
Additional paid-in capital 1,763,939 1,620,535
Accumulated other comprehensive income (loss) (9) 44
Deficit accumulated during the development stage (2,010,298) (1,935,546)
Total stockholders' deficit (244,375) (313,652)
Total $ 240,392 $ 199,553