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Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Current Assets:    
Cash and cash equivalents $ 53,506 $ 17,974
Prepaid expenses and other current assets 584 266
Total Current Assets 54,090 18,240
Property and equipment, net 1,752 1,075
Other long-term assets 130 130
Total Assets 55,972 19,445
Current Liabilities:    
Accounts payable 1,912 1,010
Accrued expenses 1,750 1,498
Accrued disposition costs 0 1,082
Convertible notes payable to related parties, net of discount 492 103
Total current liabilities 4,154 3,693
Commitments and Contingencies (Note 7)      
Stockholders' Equity:    
Preferred stock, 2,500,000 shares authorized; none issued or outstanding at December31, 2012 and 2011      
Common stock, $0.01 par value, 1,500,000,000 shares and 1,500,000,000 shares authorized; and 302,232,459 shares and 200,046,292 shares issued and outstanding at December31, 2012 and 2011, respectively 3,024 2,002
Additional paid-in capital 232,381 173,989
Accumulated deficit (183,587) (160,239)
Total Stockholders' Equity 51,818 15,752
Total Liabilities and Stockholders' Equity $ 55,972 $ 19,445