Marketable Securities (Schedule Of Cost And Fair Value Of Marketable Securities) (Details) - USD ($) |
Jun. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost Basis | $ 17,988,827 | |
| Gross Unrealized Losses | (56,886) | |
| Fair Value | 17,931,941 | |
| Commercial Paper [Member] | ||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost Basis | 3,241,005 | |
| Gross Unrealized Losses | (2,505) | |
| Fair Value | 3,238,500 | |
| Corporate Bonds [Member] | ||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost Basis | $ 11,712,323 | 14,747,822 |
| Gross Unrealized Losses | (64,955) | (54,381) |
| Fair Value | $ 11,647,368 | $ 14,693,441 |
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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 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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