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Significant Accounting Policies - Assumptions Used for Common Stock Warrant Liability Issued (Details) - Common stock warrant liability issued
3 Months Ended
Mar. 31, 2015
$ / shares
February 26, 2015  
Class of Warrant or Right [Line Items]  
Exercise Price $ 0.50
Closing Market Price $ 0.45
Risk-free Rate 1.62%
Market Price Volatility 102.50%
Remaining Term (years) 5 years 6 months
Expected dividend yield 0.00%
Probability of change in control 15.00%
March 17-31, 2015  
Class of Warrant or Right [Line Items]  
Closing Market Price $ 0.45
Risk-free Rate 0.03%
Market Price Volatility 190.00%
Remaining Term (years) 2 months 16 days
Expected dividend yield 0.00%
Probability of change in control