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Fair Value Measurement (Details) (Fair Value, Measurements, Recurring [Member], USD $) | Jun. 30, 2012
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Financial assets |
Total financial assets | $ 8,710,400
Financial liabilities: |
Total financial liabilities | 5,826,170
Bond obligation [Member] |
Financial liabilities: |
Total financial liabilities | 430,000
Warrant liabilities [Member] |
Financial liabilities: |
Total financial liabilities | 5,396,170
Money market funds [Member] | Cash equivalents [Member] |
Financial assets |
Total financial assets | 470,600
U.S. Treasury debt obligations [Member] | Cash equivalents [Member] |
Financial assets |
Total financial assets | 6,539,986
Debt securities [Member] | Marketable securities [Member] |
Financial assets |
Total financial assets | 1,699,814
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |
Financial assets |
Total financial assets | 7,010,586
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Money market funds [Member] | Cash equivalents [Member] |
Financial assets |
Total financial assets | 470,600
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Treasury debt obligations [Member] | Cash equivalents [Member] |
Financial assets |
Total financial assets | 6,539,986
Significant Other Observable Inputs (Level 2) [Member] |
Financial assets |
Total financial assets | 1,699,814
Financial liabilities: |
Total financial liabilities | 436,152
Significant Other Observable Inputs (Level 2) [Member] | Bond obligation [Member] |
Financial liabilities: |
Total financial liabilities | 430,000
Significant Other Observable Inputs (Level 2) [Member] | Warrant liabilities [Member] |
Financial liabilities: |
Total financial liabilities | 6,152
Significant Other Observable Inputs (Level 2) [Member] | Debt securities [Member] | Marketable securities [Member] |
Financial assets |
Total financial assets | 1,699,814
Unobservable Inputs (Level 3) [Member] |
Financial liabilities: |
Total financial liabilities | 5,390,018
Unobservable Inputs (Level 3) [Member] | Warrant liabilities [Member] |
Financial liabilities: |
Total financial liabilities | $ 5,390,018

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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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Balance Type: | debit
Period Type: | instant

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Data Type: | xbrli:stringItemType
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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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Balance Type: | credit
Period Type: | instant

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- Details
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