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Accrued Expenses (Tables) | 6 Months Ended
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Jun. 30, 2013
Accrued Expenses | Accrued expenses consist of the following:
|  | June 30, |  | December 31,
|  | 2013 |  | 2012
Payroll and benefits |  | $ | 2,162,634 |  |  | $ | 2,477,833 |
Professional fees |  |  | 469,991 |  |  |  | 642,853 |
Clinical trial costs |  |  | 67,767 |  |  |  | 102,414 |
Restructuring costs |  |  | 283,063 |  |  |  | 933,732 |
Other |  |  | 1,520,096 |  |  |  | 1,680,212 |
Total |  | $ | 4,503,551 |  |  | $ | 5,837,044 |

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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_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration