Allocation (Details Textual) - USD ($) $ in Millions |
1 Months Ended | 11 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 26, 2017 |
Dec. 31, 2015 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Allocated Share-based Compensation Expense | $ 0.1 | $ 0.2 | $ 0.3 | ||
| Share Based Compensation Allocation Percentage | 100.00% | ||||
| IPO [Member] | |||||
| Allocated Share-based Compensation Expense | $ 0.6 | ||||
| Research and Development Expense [Member] | |||||
| Share Based Compensation Allocation Percentage | 50.00% | ||||
| General and Administrative Expense [Member] | |||||
| Share Based Compensation Allocation Percentage | 50.00% | ||||
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- Definition The percentage of share based compensation expenses allocated to research and development and general and administrative expenses. No definition available.
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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