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Stockholders' Equity (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended | 197 Months Ended |  | 12 Months Ended | 185 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2010 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 Preferred stock | Dec. 31, 2011 Preferred stock | Dec. 31, 2010 Common stock
Stockholders' Equity |  |  |  |  |  |
Number of shares of Preferred Stock exchanged for common stock |  | 0 | 0 |  |  |
Conversion of Convertible Preferred Stock |  |  |  |  |  |
Preferred shares exchanged (in shares) |  |  |  | 833,671 | 1,776,858 |
Common shares issued: |  |  |  |  |  |
At stated convertible option (in shares) |  |  |  |  |  | 50,679
Incremental shares issued under the exchange transaction (in shares) |  |  |  |  |  | 185,835
Total common shares issued (in shares) |  |  |  |  |  | 236,514
Deemed dividends recorded | $ 3,515 | $ 3,515 |  |  |  |

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