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Net Loss per Share Applicable to Common Stockholders (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Excluded potentially dilutive securities 32,741,589us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 9,544,657us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Stock option [Member]    
Excluded potentially dilutive securities 8,807,667us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
1,566,667us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
Investor Relations Contact [Member]    
Excluded potentially dilutive securities 21,920,064us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= dei_InvestorRelationsContactMember
4,096,665us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= dei_InvestorRelationsContactMember
Compensation warrants [Member]    
Excluded potentially dilutive securities 2,013,858us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_WarrantsNotSettleableInCashMember
3,881,325us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_WarrantsNotSettleableInCashMember