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Accrued Expenses | 6 Months Ended
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Jun. 30, 2013
Accrued Expenses | 9. 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 The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 24 -Article 5 + Details
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