Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Net Loss per Common Share - Computations of Diluted Weighted Average Shares Outstanding (Detail) - shares
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 13,063,630 13,767,873
Warrants to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 678,072 480,559
Opus warrants to purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 206,593 1,700,000
Options to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 1,095,905 1,769,426
Unvested Restricted Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 9,848,505 8,763,797
Unvested Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 1,234,555 1,054,091