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Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2012
Accrued Expenses | Accrued expenses consist of the following:
|  | December 31, |
|  | 2012 |  |  | 2011 |
Payroll and benefits |  | $ | 2,477,833 |  |  | $ | 2,366,412 |
Professional fees |  |  | 642,853 |  |  |  | 793,430 |
Clinical trial costs |  |  | 102,414 |  |  |  | - |
SRL research grants |  |  | 110,350 |  |  |  | 989,556 |
Restructuring costs |  |  | 933,732 |  |  |  | - |
Other |  |  | 1,569,862 |  |  |  | 1,172,196 |
Total |  | $ | 5,837,044 |  |  | $ | 5,321,594 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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