Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Net Loss per Common Share - Computations of Diluted Weighted Average Shares Outstanding (Detail) - shares
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 14,510,348 11,131,304
Warrants to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 383,453 544,835
Opus warrants to purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 1,860,000 0
Options to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 1,105,502 1,779,365
Unvested Restricted Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 9,912,161 7,922,021
Unvested Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total of weighted average shares outstanding 1,249,232 885,083