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Accounts Payable and Accrued Expenses | 12 Months Ended
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Dec. 31, 2012
Payables and Accruals [Abstract] |
Accounts Payable and Accrued Expenses | Accounts Payable and Accrued Expenses Accounts payable and accrued expenses at December 31, 2012 and 2011 consist of the following:
| As of |  | As of
| December 31, 2012 |  | December 31, 2011
Trade accounts payable | $ | 852,573 |  |  | $ | 1,140,296 |
Accrued compensation | 1,560,704 |  |  | 1,516,307 |
Accrued severance expenses | — |  |  | 494,287 |
Accrued subcontract expenses | 72,238 |  |  | 687,715 |
Accrued accounting and audit fees | 177,810 |  |  | 119,225 |
Accrued R&D program costs | 250,000 |  |  | — |
Other accrued expenses | 268,249 |  |  | 361,112 |
| $ | 3,181,574 |  |  | $ | 4,318,942 |

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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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