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Fair Value Measurements (Reconciliation Of Changes In The Fair Value Of Liabilities) (Details) (Warrant Liabilities [Member], USD $)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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Warrant Liabilities [Member]
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| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
| Balance at January 1 |
$ 5,034,058us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
$ 2,842,065us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
| Additions |
3,691,429us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
2,564,002us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
| Unrealized losses, net |
5,180,107rnn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityUnrealizedLosses / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
1,365,654rnn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityUnrealizedLosses / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
| Transfers out of level 3 |
(10,137,243)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3 / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
(1,737,663)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3 / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
| Balance at December 31 |
$ 3,768,351us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
$ 5,034,058us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / us-gaap_FairValueByLiabilityClassAxis = rnn_WarrantLiabilitiesMember |
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- Definition
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Unrealized Losses No definition available.
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- Details
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- Definition
Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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