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Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 31, 2017 | Sep. 30, 2018 | Dec. 31, 2017 | Dec. 27, 2017
Stockholders' Equity (Textual) |  |  |  |
Warrants to purchase common stock outstanding |  | 1,116,368 | 1,116,368 |
Common stock per share |  |  |  | $ 1.00
August 2017 Private Placement [Member] | Warrant [Member] |  |  |  |
Stockholders' Equity (Textual) |  |  |  |
Issuance of common stock |  |  | 325,000 |
Common stock per share |  |  | $ 20.00 |
Cash proceeds from warrants |  |  | $ 6,500 |
Warrant, description |  |  | The 2017 Warrants will become exercisable 12 months from the date of issuance and will expire three years from the date of issuance. |
Securities Purchase Agreement [Member] | August 2017 Private Placement [Member] |  |  |  |
Stockholders' Equity (Textual) |  |  |  |
Issuance of common stock | 975,000 |  |  |
Common stock per share | $ 10.00 |  |  |
Gross proceeds warrants for an aggregate purchase price | $ 9,750 |  |  |

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