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Accrued Expenses (Details Textual) - USD ($) | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Accrued Expenses (Textual) |  |  |  |  |
Accrued expenses include an obligation | $ 6,947 | [1] |  | [1] | $ 881
Accrued services related to legal costs | 1,029,069 |  | 553,037 |  |
Accrued services related to other service costs | $ 89,803 |  | $ 47,302 |  |
[1] | Accrued expenses include an obligation to issue stock options to a consultant that has met vesting requirements as of June 30, 2018 in the amount of $6,947. See Note 10 - Stock-Based Compensation for further detail.

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- Definition Amount of expenses incurred but not yet paid classified as other, due after one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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