Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share - Additional Information (Detail)

v2.4.1.9
Net Loss Per Common Share - Additional Information (Detail)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount 9,430,425us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 8,305,219us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Restricted Stock [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount 7,704,269us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockMember