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Stockholders' Equity (Details 1) | 12 Months Ended
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Dec. 31, 2017 $ / shares shares
Summary of outstanding warrants to purchase common stock |
Shares | 11,163,677
August 2016 Prefunded Warrants [Member] |
Summary of outstanding warrants to purchase common stock |
Issue Date | Aug. 16, 2016
Exercise Price | $ / shares | $ 1.00
Shares | 3,600,000
Expiration Date | Feb. 16, 2022
August 2016 Purchase Warrants [Member] |
Summary of outstanding warrants to purchase common stock |
Issue Date | Aug. 17, 2016
Exercise Price | $ / shares | $ 1.12
Shares | 4,313,676
Expiration Date | Feb. 17, 2022
August 2017 Purchase Warrants [Member] |
Summary of outstanding warrants to purchase common stock |
Issue Date | Aug. 08, 2017
Exercise Price | $ / shares | $ 2.00
Shares | 3,250,001
Expiration Date | Aug. 08, 2020

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