Common Stock (Schedule Of Stock Option And Stock Warrant Exercises) (Details) - USD ($) |
12 Months Ended | |
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Dec. 31, 2017 |
Dec. 31, 2015 |
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| Stock Option Exercises [Abstract] | ||
| Number of shares issued | 25,000 | 88,943 |
| Total cash received | $ 77,500 | $ 708,617 |
| Stock Warrant Exercises [Abstract] | ||
| Number of shares issued | 1,652,623 | 4,730 |
| Total cash received | $ 5,354,093 | $ 22,325 |
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- Definition Stock Issued During Period, Value, Stock Options Exercised, Cash Received No definition available.
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- Definition Stock Option Exercises [Abstract] No definition available.
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- Definition Stock Warrant Exercises [Abstract] No definition available.
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- Definition Stock Warrants Exercised, Cash Received No definition available.
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- Definition Stock Warrants Exercised, Shares No definition available.
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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