Annual report pursuant to Section 13 and 15(d)

Common Stock - Computation of Basic and Diluted Net Loss Attributable to Common Shareholders Per Share (Detail)

v3.19.1
Common Stock - Computation of Basic and Diluted Net Loss Attributable to Common Shareholders Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Numerator                      
Net loss $ (3,637) $ (3,240) $ (2,788) $ (3,022) $ (3,740) $ (6,469) $ (169) $ (205) $ (12,687) $ (10,583) $ (1,234)
Denominator                      
Weighted average number of common shares outstanding                 3,510,217 479,442 2,123
Basic and diluted net loss per common share $ (0.55) $ (0.71) $ (1.82) $ (2.43) $ (3.17) $ (8.95) $ (79.60) $ (96.56) $ (3.61) $ (22.07) $ (581.25)