Marketable Securities (Schedule Of Cost And Fair Value Of Marketable Securities) (Details) - USD ($) |
Dec. 31, 2016 |
Dec. 31, 2015 |
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Schedule of Available-for-sale Securities [Line Items] | ||
Cost Basis | $ 8,743,229 | $ 13,258,127 |
Gross Unrealized Gains | 197 | 571 |
Gross Unrealized Losses | (6,319) | (18,612) |
Fair value | 8,737,107 | 13,240,086 |
Commercial Paper [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Cost Basis | 3,987,424 | 2,981,307 |
Gross Unrealized Losses | (1,684) | (3,737) |
Fair value | 3,985,740 | 2,977,570 |
Corporate Bonds [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Cost Basis | 4,035,805 | 4,036,820 |
Gross Unrealized Losses | (4,635) | (9,300) |
Fair value | 4,031,170 | 4,027,520 |
Certificates of Deposit [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Cost Basis | 720,000 | 6,240,000 |
Gross Unrealized Gains | 197 | 571 |
Gross Unrealized Losses | (5,575) | |
Fair value | $ 720,197 | $ 6,234,996 |
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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