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Stockholders' Equity (Details 6) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Effect on net loss | $ 369,000 | $ 625,000
Effect on net loss per share (in dollars per share) | $ 0.02 | $ 0.05
Research and development [Member] |  |
Effect on net loss | $ 119,000 | $ 112,000
General and administrative [Member] |  |
Effect on net loss | $ 250,000 | $ 513,000

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- Details
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- Details
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