Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share - Reconciliation of Numerator and Denominator (Detail)

v3.10.0.1
Net Loss Per Common Share - Reconciliation of Numerator and Denominator (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Numerator:        
Net loss attributable to common shareholders $ 5,244 $ 11,105 $ 23,653 $ 17,183
Weighted average number of shares used in net loss per share calculations:        
Weighted average common shares outstanding - basic and diluted 27,680,307 17,925,585 27,246,667 6,241,947
Net loss per share attributable to common shareholders:        
Basic and diluted $ 0.19 $ 0.62 $ 0.87 $ 2.75