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Accrued Expenses | 12 Months Ended
--- | ---
Dec. 31, 2017
Payables and Accruals [Abstract] |
Accrued Expenses | Accrued Expenses Accrued expenses and other current liabilities consisted of the following:
| As of
| December 31, 2017 |  | December 31, 2016
Bonus | $ | 2,538,340 |  |  | $ | 2,357,194 |
Deferred revenue-R&D for TPOXX® intravenous formulation | 1,255,318 |  |  | — |
Professional fees | 381,980 |  |  | 481,641 |
Vacation | 328,588 |  |  | 262,664 |
Other | 977,353 |  |  | 1,483,253 |
Accrued expenses and other current liabilities | $ | 5,481,579 |  |  | $ | 4,584,752 |

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