Marketable Securities (Schedule Of Cost And Fair Value Of Marketable Securities) (Details) - USD ($) |
Dec. 31, 2015 |
Dec. 31, 2014 |
---|---|---|
Schedule of Available-for-sale Securities [Line Items] | ||
Cost Basis | $ 13,258,127 | $ 22,905,698 |
Gross Unrealized Gains | 571 | 122 |
Gross Unrealized Losses | (18,612) | (33,769) |
Fair value | 13,240,086 | 22,872,051 |
Commercial Paper [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Cost Basis | 2,981,307 | 1,998,001 |
Gross Unrealized Gains | 62 | |
Gross Unrealized Losses | (3,737) | (153) |
Fair value | 2,977,570 | 1,997,910 |
Corporate Bonds [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Cost Basis | 4,036,820 | 2,042,697 |
Gross Unrealized Losses | (9,300) | (6,827) |
Fair value | 4,027,520 | 2,035,870 |
Certificates of Deposit [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Cost Basis | 6,240,000 | 18,865,000 |
Gross Unrealized Gains | 571 | 60 |
Gross Unrealized Losses | (5,575) | (26,789) |
Fair value | $ 6,234,996 | $ 18,838,271 |
X | ||||||||||
- 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
|
X | ||||||||||
- 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
|
X | ||||||||||
- 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
|
X | ||||||||||
- 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
|
X | ||||||||||
- 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.
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|