Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Net Loss per Common Share - Computations of Diluted Weighted Average Shares Outstanding (Detail) - shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total of weighted average shares outstanding 13,676,979 9,889,452 9,058,166
Warrants to Purchase Common Stock [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total of weighted average shares outstanding 456,150 685,061 693,636
Opus warrants to purchase Common Stock [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total of weighted average shares outstanding 1,780,000 0 0
Options to Purchase Common Stock [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total of weighted average shares outstanding 1,604,214 1,960,443 2,276,813
Unvested Restricted Stock [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total of weighted average shares outstanding 8,749,052 6,816,321 6,087,717
Unvested Restricted Stock Units [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Total of weighted average shares outstanding 1,087,563 427,627 0