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Organization and Description of Business (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended | 107 Months Ended
--- | --- | --- | --- | ---
Jan. 25, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016
Organization and Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net Loss |  | $ (2,306,000) | $ (3,846,000) | $ (2,431,000) | $ (2,589,000) | $ (2,558,000) | $ (1,961,000) | $ (1,796,000) | $ (1,583,000) | $ (11,173,000) | $ (7,898,000) | $ 40,331,000
Subsequent Event [Member] | Right Offering and Public Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |
Organization and Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gross Proceeds From Public Stock Offering Of CommonStock | $ 9,600,000 |  |  |  |  |  |  |  |  |  |  |

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