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Financial Instruments (Details) (USD $) | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Available-for-sale securities held in investment portfolio |  |
Amortized Cost | $ 17,050,026 | $ 22,373,308
Gross Unrealized Gains |  |
Gross Unrealized (Losses) | (1,439) | (1,356)
Fair Value | 17,048,587 | 22,371,952
Cash [Member] |  |
Available-for-sale securities held in investment portfolio |  |
Amortized Cost | 622,831 | 254,267
Gross Unrealized Gains |  |
Gross Unrealized (Losses) |  |
Fair Value | 622,831 | 254,267
Cash equivalents [Member] |  |
Available-for-sale securities held in investment portfolio |  |
Amortized Cost | 6,608,247 | 8,217,259
Gross Unrealized Gains |  |
Gross Unrealized (Losses) |  | (252)
Fair Value | 6,608,247 | 8,217,007
Marketable Securities Current [Member] |  |
Available-for-sale securities held in investment portfolio |  |
Amortized Cost | 9,818,948 | 13,901,782
Gross Unrealized Gains |  |
Gross Unrealized (Losses) | (1,439) | (1,104)
Fair Value | $ 9,817,509 | $ 13,900,678

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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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