Stock-Based Compensation (Summary Of Stock Compensation Expense) (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Share Based Compensation | $ 76,302 | $ 161,000 | $ 456,750 | $ 1,228,335 |
| General and administrative [Member] | ||||
| Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Share Based Compensation | 72,420 | 116,679 | 393,483 | 883,855 |
| Research and development [Member] | ||||
| Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Share Based Compensation | $ 3,882 | $ 44,321 | $ 63,267 | $ 344,480 |
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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.
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