Significant Accounting Policies (Details Textual) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Mar. 17, 2015 |
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| Equity Method Investment, Annual Equity Fee, Percentage | 2.50% | ||
| Research and Development Expense [Member] | |||
| Stock Issued During Period, Value, Issued for Services | $ 2.3 | $ 3.9 | |
| X | ||||||||||
- Definition This element represent that percentage of annual equity fee. No definition available.
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| X | ||||||||||
- Definition Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders. No definition available.
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| X | ||||||||||
- Details
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