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Redeemable Convertible Preferred Stock (Details) (Fair Value, Inputs, Level 3 [Member])
9 Months Ended
Sep. 30, 2014
Fair Value, Inputs, Level 3 [Member]
 
Expected life of the redemption in years 1 year
Risk free interest rate 0.13%
Expected annual volatility 69.78%
Annual rate of dividends 0.00%