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Condensed Consolidated Statements of Stockholders' Deficit (Parenthetical) | May 02, 2018 | Nov. 06, 2017 | Jul. 21, 2016 $ / shares | Jun. 30, 2018 $ / shares | Dec. 31, 2017 $ / shares | Dec. 31, 2016 $ / shares
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Statement of Stockholders' Equity [Abstract] |  |  |  |  |  |
Reverse stock split ratio | 0.0020 | 0.0029 | 0.0625 |  |  |
Common stock issued, par value |  |  | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01

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