Income Taxes (Schedule Of Deferred Tax Assets And Valuation Allowance) (Details) - USD ($) |
Mar. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Income Taxes [Abstract] | |||
| Net Operating Loss Carryforwards | $ 44,230,000 | $ 43,844,000 | $ 41,184,000 |
| Stock Compensation Expense | 551,000 | 1,191,000 | 1,608,000 |
| Book Tax Differences on Assets and Liabilities | 163,000 | 464,000 | 195,000 |
| Valuation Allowance | (44,944,000) | (45,499,000) | (42,987,000) |
| Net Deferred Tax Assets |
| X | ||||||||||
- Definition Deferred Tax Assets Book Tax Differences On Assets And Liabilities No definition available.
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| X | ||||||||||
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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