Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Common Share - Computations of Diluted Weighted Average Shares Outstanding (Detail)

v3.5.0.2
Net Loss per Common Share - Computations of Diluted Weighted Average Shares Outstanding (Detail) - shares
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 12,348,653 10,489,695
Warrants to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 515,068 685,061
Options to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 1,754,365 2,064,365
Unvested Restricted Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 8,705,137 7,704,269
Unvested Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 1,374,083 36,000