Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Assumptions used in Estimating Common and Preferred Stock Warrant Liability (Details)

v2.4.1.9
Fair Value Measurements - Schedule of Assumptions used in Estimating Common and Preferred Stock Warrant Liability (Details) (Common Stock, USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Common Stock
   
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Fair value of common share $ 0.35us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 0.80us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
Weighted-average risk free interest rate 1.25%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
1.53%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
Weighted-average expected life 4 years 9 months 4 years 7 months
Expected dividend yield 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
Weighted average expected volatility 119.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
116.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember