Annual report pursuant to Section 13 and 15(d)

Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail)

v3.19.3.a.u2
Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Earnings Per Share [Abstract]                      
Net loss $ (12,165) $ (10,669) $ (9,403) $ (7,375) $ (8,468) $ (7,483) $ (7,576) $ (4,370) $ (39,612) $ (27,897) $ (25,980)
Weighted average shares outstanding - basic and diluted                 32,805,684 30,683,421 23,153,661
Basic and diluted loss per share                 $ (1.21) $ (0.91) $ (1.12)
Anti-dilutive stock options, restricted stock units and performance stock units                 5,606,552 4,253,301 5,257,365