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Accrued Expenses and Other Current Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Payables and Accruals [Abstract] |
Schedule of Accrued Liabilities [Table Text Block] | As of December 31, 2017 and 2016, accrued expenses and other current liabilities consisted of the following:
|  | December 31, |
|  | 2017 |  | 2016 |
Accrued research and development expenses |  | $ | 120,455 |  | $ | 61,000 |
Accrued legal expenses |  |  | - |  |  | 37,597 |
Accrued rent expense |  |  | - |  |  | 18,590 |
Accrued professional services |  |  | 41,831 |  |  | - |
Accrued offering costs |  |  | 133,000 |  |  | - |
Other |  |  | 10,977 |  |  | 4,516 |
Total accrued expenses and other current liabilities |  | $ | 306,263 |  | $ | 121,703 |

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