Stock-Based Compensation (Summary Of Stock Compensation Expense) (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Share Based Compensation | $ 1,044,167 | $ 1,409,488 | $ 1,037,679 |
| General and administrative [Member] | |||
| Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Share Based Compensation | 765,726 | 905,911 | 665,063 |
| Research and development [Member] | |||
| Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Share Based Compensation | $ 278,441 | $ 503,577 | $ 372,616 |
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|