Quarterly report pursuant to Section 13 or 15(d)

Net Income Loss Per Share - Computation of Basic and Diluted Net Loss Per Common Share (Detail)

v3.20.2
Net Income Loss Per Share - Computation of Basic and Diluted Net Loss Per Common Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Numerator            
Net loss $ (11,013) $ (14,197) $ (35,490) $ (47,194) $ (62,078) $ (61,104)
Denominator            
Weighted-average common shares outstanding 27,606,061 22,382,973 27,180,059 20,936,860    
Less: Weighted-average shares subject to repurchase (12,746) (37,851) (17,179) (54,567)    
Denominator for basic and diluted net loss per share 27,593,315 22,345,122 27,162,880 20,882,293    
Basic and diluted net loss per share $ (0.40) $ (0.64) $ (1.31) $ (2.26)