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Net Loss Per Share - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Stock options, Series B Convertible Preferred Stock, warrants and stock awards excluding calculation of diluted net loss per share 5,310,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 7,780,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Dilutive securities, effect on basic earnings per share $ 0us-gaap_DilutiveSecurities $ 0us-gaap_DilutiveSecurities