Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share of Common Stock - Schedule of Computation of Basic and Diluted Net Loss Per Share for Common Stockholders (Detail)

v2.4.1.9
Net Loss Per Share of Common Stock - Schedule of Computation of Basic and Diluted Net Loss Per Share for Common Stockholders (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Net loss $ (4,851,763)us-gaap_NetIncomeLoss $ (5,212,812)us-gaap_NetIncomeLoss
Weighted average shares of common stock outstanding 20,221,463us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 1,011,997us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Net loss per share of common stock-basic and diluted $ (0.24)us-gaap_EarningsPerShareBasicAndDiluted $ (5.15)us-gaap_EarningsPerShareBasicAndDiluted