Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share - Additional Information (Detail)

v3.3.0.814
Net Loss Per Common Share - Additional Information (Detail) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount 10,154,952 9,164,131 9,757,654 8,889,050
Restricted Stock [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount     7,670,935