Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $)
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Mar. 31, 2015
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Dec. 31, 2014
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Total Assets: |
$ 18,655,821us-gaap_AssetsFairValueDisclosure
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$ 22,872,051us-gaap_AssetsFairValueDisclosure
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Warrant Liabilities |
3,652,936us-gaap_LiabilitiesFairValueDisclosure
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3,768,351us-gaap_LiabilitiesFairValueDisclosure
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Corporate Bonds [Member] |
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Total Assets: |
2,534,100us-gaap_AssetsFairValueDisclosure / us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis = us-gaap_CorporateBondSecuritiesMember
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2,035,870us-gaap_AssetsFairValueDisclosure / us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis = us-gaap_CorporateBondSecuritiesMember
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Certificates of Deposit [Member] |
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Total Assets: |
15,122,441us-gaap_AssetsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember
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18,838,271us-gaap_AssetsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember
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Commercial Paper [Member] |
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Total Assets: |
999,280us-gaap_AssetsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember
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1,997,910us-gaap_AssetsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember
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Level 2 [Member] |
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Total Assets: |
18,655,821us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
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22,872,051us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
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Level 2 [Member] | Corporate Bonds [Member] |
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Total Assets: |
2,534,100us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis = us-gaap_CorporateBondSecuritiesMember
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2,035,870us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis = us-gaap_CorporateBondSecuritiesMember
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Level 2 [Member] | Certificates of Deposit [Member] |
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Total Assets: |
15,122,441us-gaap_AssetsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
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18,838,271us-gaap_AssetsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
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Level 2 [Member] | Commercial Paper [Member] |
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Total Assets: |
999,280us-gaap_AssetsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
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1,997,910us-gaap_AssetsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
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Level 3 [Member] |
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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Warrant Liabilities |
$ 3,652,936us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
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$ 3,768,351us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
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