Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Summary of Stock Options Activity (Detail)

v3.4.0.3
Common Stock - Summary of Stock Options Activity (Detail)
3 Months Ended
Mar. 31, 2016
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Number of Optioned Common Shares, Beginning Balance | shares 1,479,221
Number of Optioned Common Shares, Granted | shares 1,513,750
Number of Optioned Common Shares, Forfeited | shares (32,205)
Number of Optioned Common Shares, Ending Balance | shares 2,960,766
Weighted Average Exercise Price, Beginning Balance | $ / shares $ 8.78
Weighted Average Exercise Price, Granted | $ / shares 0.85
Weighted Average Exercise Price, Forfeited | $ / shares 4.11
Weighted Average Exercise Price, Ending Balance | $ / shares $ 4.78