Marketable Securities (Schedule Of Cost And Fair Value Of Marketable Securities) (Details) - USD ($) |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost Basis | $ 11,905,421 | |
| Gross Unrealized Gains | ||
| Gross Unrealized Losses | (12,602) | |
| Fair Value | 11,892,819 | |
| Commercial Paper [Member] | ||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost Basis | 5,902,433 | |
| Gross Unrealized Gains | ||
| Gross Unrealized Losses | (5,414) | |
| Fair Value | 5,897,019 | |
| Corporate Bonds [Member] | ||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost Basis | 6,002,988 | $ 5,999,356 |
| Gross Unrealized Gains | ||
| Gross Unrealized Losses | (7,188) | (17,836) |
| Fair Value | $ 5,995,800 | $ 5,981,520 |
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. No definition available.
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. No definition available.
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. No definition available.
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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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