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Other Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Payables and Accruals [Abstract] |
Schedule of Other Accrued Liabilities | Other accrued liabilities at December 31, 2018 and 2017 include the following:
|  | Year Ended December 31, |
|  | 2018 |  |  | 2017 |
Amounts due to contract research organizations and other contractual agreements |  | $ | 749,369 |  |  | $ | 665,373 |
Accrued payroll and related benefits |  |  | 1,592,590 |  |  |  | 1,258,265 |
Accrued professional fees |  |  | 198,654 |  |  |  | 264,668 |
Other |  |  | 45,285 |  |  |  | 94,521 |
Total |  | $ | 2,585,898 |  |  | $ | 2,282,827 |

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