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v2.4.0.6

Subsequent Events (Details) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 13 Months Ended
--- | --- | --- | --- | ---
May 14, 2009 | Dec. 31, 2012 | Dec. 31, 2010 | Oct. 31, 2010 | May 31, 2009 | Mar. 31, 2009 | Dec. 31, 2012 | Jun. 30, 2010 | Jun. 30, 2010
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Common stock issued (in shares) | 1,864,783 | 7,020,000 | 1,428,571 | 4,600,000 | 1,864,783 | 4,771,174 |  | 3,300,000 | 7,150,000
Gross proceeds from sale of common stock | $ 4,252,000 |  |  | $ 20,700,000 |  | $ 10,000,000 |  | $ 17,314,000 |
Number of installment payments |  |  |  |  |  |  | 6 |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Common stock issued (in shares) |  |  |  |  |  |  | 1,053,000 |  |
Gross proceeds from sale of common stock |  |  |  |  |  |  | 3,001,000 |  |
Payment obligation under termination agreement |  | 1,200,000 |  |  |  |  | 1,200,000 |  |
Periodic payment under termination agreement |  |  |  |  |  |  | 200,000 |  |

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