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Fair Value Measurement (Details 1) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Dec. 31, 2011
Fair Value, Measurements [Member] |  |
Roll forward for financial assets and liabilities measured at fair value using significant other observable inputs (Level 2) |  |
Investments, Fair Value Disclosure | $ 21,463,358 |
Marketable debt securities, ending Balance | 21,463,358 |
Fair Value Measurement With Unobservable inputs reconciliation recurring basis asset transfers into level 1 | 2,751,144 |
Liabilities Measured at Fair Value, ending balance | 14,864,398 |
Marketable debt securities [Member] |  |
Roll forward for financial assets and liabilities measured at fair value using significant other observable inputs (Level 2) |  |
Investments, Fair Value Disclosure | 6,031,735 | 3,280,591
Marketable debt securities, ending Balance | 6,031,735 | 3,280,591
Bond obligation [Member] |  |
Roll forward for financial assets and liabilities measured at fair value using significant other observable inputs (Level 2) |  |
Financial liabilities change settled in earning fair value disclosure | (141,250) |
Liabilities Measured at Fair Value, ending balance | 381,250 | 522,500
Warrant liabilities [Member] |  |
Roll forward for financial assets and liabilities measured at fair value using significant other observable inputs (Level 2) |  |
Financial liabilities change included in earning fair value disclosure | 203,293 |
Liabilities Measured at Fair Value, ending balance | $ 234,488 | $ 31,195

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- Definition Fair value measurement with directly or indirectly observable inputs reconciliation recurring basis liability gain loss included in earnings. + References No definition available. + Details
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- Definition Fair value measurement with directly or indirectly observable inputs reconciliation recurring basis liability settlements. + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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