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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

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